removing of support for admin_authtoken breaks Fuel master deployment

[Nikita Karpin]

Upstream patch https://review.openstack.org/#/c/436197/ removes support of admin auth token, this causes failure of master node deployment:

Error: Could not prefetch keystone_service provider 'openstack': Insufficient credentials to authenticate
Error: Not managing Keystone_service[ostf] due to earlier Keystone API failures.
Error: /Stage[main]/Fuel::Ostf::Auth/Keystone_service[ostf]/ensure: change from absent to present failed: Not managing Keystone_service[ostf] due to earlier Keystone API failures.
Debug: Prefetching openstack resources for keystone_role
Error: Could not prefetch keystone_role provider 'openstack': Insufficient credentials to authenticate
Error: Not managing Keystone_role[admin] due to earlier Keystone API failures.
Error: /Stage[main]/Fuel::Keystone/Keystone_role[admin]/ensure: change from absent to present failed: Not managing Keystone_role[admin] due to earlier Keystone API failures.
Debug: Class[Apache::Service]: The container Stage[main] will propagate my refresh event
Debug: Prefetching openstack resources for keystone_endpoint
Error: Could not prefetch keystone_endpoint provider 'openstack': Insufficient credentials to authenticate
Notice: /Stage[main]/Fuel::Ostf::Auth/Keystone_endpoint[RegionOne/ostf]: Dependency Keystone_service[ostf] has failures: true
Warning: /Stage[main]/Fuel::Ostf::Auth/Keystone_endpoint[RegionOne/ostf]: Skipping because of failed dependencies
Error: Not managing Keystone_role[monitoring] due to earlier Keystone API failures.
Error: /Stage[main]/Fuel::Keystone/Keystone_role[monitoring]/ensure: change from absent to present failed: Not managing Keystone_role[monitoring] due to earlier Keystone API failures.
Error: Not managing Keystone_service[nailgun] due to earlier Keystone API failures.
Error: /Stage[main]/Fuel::Auth/Keystone_service[nailgun]/ensure: change from absent to present failed: Not managing Keystone_service[nailgun] due to earlier Keystone API failures.
Debug: Class[Apache]: The container Stage[main] will propagate my refresh event
Error: Not managing Keystone_service[keystone] due to earlier Keystone API failures.
Error: /Stage[main]/Keystone::Endpoint/Keystone::Resource::Service_identity[keystone]/Keystone_service[keystone::identity]/ensure: change from absent to present failed: Not managing Keystone_service[keystone] due to earlier Keystone API failures.