RemoteStackTest timeout, fails with db error at creation

[Thomas Herve]

Seen here:
http://logs.openstack.org/81/370881/1/gate/gate-heat-dsvm-functional-convg-mysql-lbaasv2/9e9b0a2/logs/

Traceback (most recent call last):
.py", line 133, in _process_incoming
     res = self.dispatcher.dispatch(message)
   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 150, in dispatch
     return self._do_dispatch(endpoint, method, ctxt, args)
   File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 121, in _do_dispatch
     result = func(ctxt, **new_args)
   File "/usr/local/lib/python2.7/dist-packages/osprofiler/profiler.py", line 154, in wrapper
     return f(*args, **kwargs)
   File "/opt/stack/new/heat/heat/common/context.py", line 424, in wrapped
     return func(self, ctx, *args, **kwargs)
   File "/opt/stack/new/heat/heat/engine/worker.py", line 144, in check_resource
     cnxt, resource_id, resource_data, is_update)
   File "/opt/stack/new/heat/heat/engine/check_resource.py", line 292, in load_resource
     is_update, cache_data)
   File "/opt/stack/new/heat/heat/engine/resource.py", line 315, in load
     db_res = resource_objects.Resource.get_obj(context, resource_id)
   File "/opt/stack/new/heat/heat/objects/resource.py", line 121, in get_obj
     refresh=refresh)
   File "/opt/stack/new/heat/heat/db/api.py", line 104, in resource_get
     return IMPL.resource_get(context, resource_id, refresh=refresh)
   File "/opt/stack/new/heat/heat/db/sqlalchemy/api.py", line 171, in resource_get
     result = context.session.query(models.Resource).get(resource_id)
   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 831, in get
     return self._get_impl(ident, loading.load_on_ident)
   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 842, in _get_impl
     if len(ident) != len(mapper.primary_key):
 TypeError: object of type 'NoneType' has no len()