Here you go:

Debug: /Stage[main]/Vswitch::Ovs/Package[openvswitch-switch]: The container Class[Vswitch::Ovs] will propagate my refresh event
Debug: Executing '/sbin/status openvswitch-switch'
Debug: Executing '/sbin/initctl --version'
Debug: Class[Vswitch::Ovs]: The container Stage[main] will propagate my refresh event
Debug: Executing '/usr/bin/ovs-vsctl br-exists br-ex'
Debug: Executing '/usr/bin/ovs-vsctl add-br br-ex'
Debug: Executing '/sbin/ip link set br-ex up'
Notice: /Stage[main]/Neutron::Agents::Ml2::Ovs/Neutron::Plugins::Ovs::Bridge[external:br-ex]/Vs_bridge[br-ex]/ensure: created
Debug: /Stage[main]/Neutron::Agents::Ml2::Ovs/Neutron::Plugins::Ovs::Bridge[external:br-ex]/Vs_bridge[br-ex]: The container Neutron::Plugins::Ovs::Bridge[external:br-ex] will propagate my refresh event
Debug: Neutron::Plugins::Ovs::Bridge[external:br-ex]: The container Class[Neutron::Agents::Ml2::Ovs] will propagate my refresh event
Info: Neutron::Plugins::Ovs::Bridge[external:br-ex]: Scheduling refresh of Exec[eth1 up]
Debug: Executing '/usr/bin/ovs-vsctl list-ports br-ex'
Debug: Executing '/usr/bin/ovs-vsctl -- --id=@iface0 create Interface name=eth1 -- add-port br-ex eth1 interfaces=@iface0'
Error: Could not set 'present' on ensure: undefined method `vlan?' for Vs_port[eth1](provider=ovs):Puppet::Type::Vs_port::ProviderOvs at 7:/etc/puppet/modules/neutron/manifests/plugins/ovs/port.pp
/etc/puppet/modules/vswitch/lib/puppet/provider/vs_port/ovs.rb:36:in `create'
/usr/lib/ruby/vendor_ruby/puppet/property/ensure.rb:16:in `block in defaultvalues'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:197:in `call_valuemethod'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:498:in `set'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:581:in `sync'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:191:in `sync'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:128:in `sync_if_needed'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:81:in `perform_changes'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:20:in `evaluate'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:174:in `apply'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:187:in `eval_resource'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `call'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `block (2 levels) in evaluate'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:327:in `block in thinmark'
/usr/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:326:in `thinmark'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `block in evaluate'
/usr/lib/ruby/vendor_ruby/puppet/graph/relationship_graph.rb:118:in `traverse'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:108:in `evaluate'
/usr/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:164:in `block in apply'
/usr/lib/ruby/vendor_ruby/puppet/util/log.rb:149:in `with_destination'
/usr/lib/ruby/vendor_ruby/puppet/transaction/report.rb:108:in `as_logging_destination'
/usr/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:163:in `apply'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:125:in `block in apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:161:in `block in benchmark'
/usr/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:160:in `benchmark'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:124:in `apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:192:in `run'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:268:in `apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:218:in `main'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:146:in `run_command'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `block (2 levels) in run'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:470:in `plugin_hook'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `block in run'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:478:in `exit_on_fail'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `run'
/usr/lib/ruby/vendor_ruby/puppet/util/command_line.rb:137:in `run'
/usr/lib/ruby/vendor_ruby/puppet/util/command_line.rb:91:in `execute'
/usr/bin/puppet:4:in `<main>'
Error: Could not set 'present' on ensure: undefined method `vlan?' for Vs_port[eth1](provider=ovs):Puppet::Type::Vs_port::ProviderOvs at 7:/etc/puppet/modules/neutron/manifests/plugins/ovs/port.pp
/etc/puppet/modules/vswitch/lib/puppet/provider/vs_port/ovs.rb:36:in `create'
/usr/lib/ruby/vendor_ruby/puppet/property/ensure.rb:16:in `block in defaultvalues'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:197:in `call_valuemethod'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:498:in `set'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:581:in `sync'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:191:in `sync'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:128:in `sync_if_needed'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:81:in `perform_changes'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:20:in `evaluate'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:174:in `apply'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:187:in `eval_resource'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `call'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `block (2 levels) in evaluate'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:327:in `block in thinmark'
/usr/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:326:in `thinmark'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `block in evaluate'
/usr/lib/ruby/vendor_ruby/puppet/graph/relationship_graph.rb:118:in `traverse'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:108:in `evaluate'
/usr/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:164:in `block in apply'
/usr/lib/ruby/vendor_ruby/puppet/util/log.rb:149:in `with_destination'
/usr/lib/ruby/vendor_ruby/puppet/transaction/report.rb:108:in `as_logging_destination'
/usr/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:163:in `apply'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:125:in `block in apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:161:in `block in benchmark'
/usr/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:160:in `benchmark'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:124:in `apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:192:in `run'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:268:in `apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:218:in `main'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:146:in `run_command'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `block (2 levels) in run'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:470:in `plugin_hook'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `block in run'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:478:in `exit_on_fail'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `run'
/usr/lib/ruby/vendor_ruby/puppet/util/command_line.rb:137:in `run'
/usr/lib/ruby/vendor_ruby/puppet/util/command_line.rb:91:in `execute'
/usr/bin/puppet:4:in `<main>'
Wrapped exception:
undefined method `vlan?' for Vs_port[eth1](provider=ovs):Puppet::Type::Vs_port::ProviderOvs
/etc/puppet/modules/vswitch/lib/puppet/provider/vs_port/ovs.rb:36:in `create'
/usr/lib/ruby/vendor_ruby/puppet/property/ensure.rb:16:in `block in defaultvalues'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:197:in `call_valuemethod'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:498:in `set'
/usr/lib/ruby/vendor_ruby/puppet/property.rb:581:in `sync'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:191:in `sync'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:128:in `sync_if_needed'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:81:in `perform_changes'
/usr/lib/ruby/vendor_ruby/puppet/transaction/resource_harness.rb:20:in `evaluate'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:174:in `apply'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:187:in `eval_resource'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `call'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `block (2 levels) in evaluate'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:327:in `block in thinmark'
/usr/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:326:in `thinmark'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:117:in `block in evaluate'
/usr/lib/ruby/vendor_ruby/puppet/graph/relationship_graph.rb:118:in `traverse'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:108:in `evaluate'
/usr/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:164:in `block in apply'
/usr/lib/ruby/vendor_ruby/puppet/util/log.rb:149:in `with_destination'
/usr/lib/ruby/vendor_ruby/puppet/transaction/report.rb:108:in `as_logging_destination'
/usr/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:163:in `apply'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:125:in `block in apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:161:in `block in benchmark'
/usr/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:160:in `benchmark'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:124:in `apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:192:in `run'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:268:in `apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:218:in `main'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:146:in `run_command'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `block (2 levels) in run'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:470:in `plugin_hook'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `block in run'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:478:in `exit_on_fail'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `run'
/usr/lib/ruby/vendor_ruby/puppet/util/command_line.rb:137:in `run'
/usr/lib/ruby/vendor_ruby/puppet/util/command_line.rb:91:in `execute'
/usr/bin/puppet:4:in `<main>'
Error: /Stage[main]/Neutron::Agents::Ml2::Ovs/Neutron::Plugins::Ovs::Port[br-ex:eth1]/Vs_port[eth1]/ensure: change from absent to present failed: Could not set 'present' on ensure: undefined method `vlan?' for Vs_port[eth1](provider=ovs):Puppet::Type::Vs_port::ProviderOvs at 7:/etc/puppet/modules/neutron/manifests/plugins/ovs/port.pp
Debug: Exec[eth1 up](provider=posix): Executing 'ip link set eth1 up'
Debug: Executing 'ip link set eth1 up'