stable/kilo devstack fails with keystone-manage db_sync pkg_resources.ContextualVersionConflict

[Lajos Katona]

Stable kilo build has a traceback at keyston-manage db_sync part:

2016-04-18 13:11:30.344 | + /usr/local/bin/keystone-manage db_sync
2016-04-18 13:11:31.142 | Traceback (most recent call last):
2016-04-18 13:11:31.142 | File "/usr/local/bin/keystone-manage", line 4, in <module>
2016-04-18 13:11:31.142 | __import__('pkg_resources').require('keystone==2015.1.4.dev4')
2016-04-18 13:11:31.142 | File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2927, in <module>
2016-04-18 13:11:31.143 | @_call_aside
2016-04-18 13:11:31.143 | File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2913, in _call_aside
2016-04-18 13:11:31.143 | f(*args, **kwargs)
2016-04-18 13:11:31.143 | File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2940, in _initialize_master_working_set
2016-04-18 13:11:31.144 | working_set = WorkingSet._build_master()
2016-04-18 13:11:31.144 | File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 637, in _build_master
2016-04-18 13:11:31.144 | return cls._build_from_requirements(__requires__)
2016-04-18 13:11:31.144 | File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 650, in _build_from_requirements
2016-04-18 13:11:31.145 | dists = ws.resolve(reqs, Environment())
2016-04-18 13:11:31.145 | File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 834, in resolve
2016-04-18 13:11:31.145 | raise VersionConflict(dist, req).with_context(dependent_req)
2016-04-18 13:11:31.145 | pkg_resources.ContextualVersionConflict: (pbr 0.11.1 (/usr/local/lib/python2.7/dist-packages), Requirement.parse('pbr>=1.8'), set(['testresources']))
2016-04-18 13:11:31.157 | + exit_trap
2016-04-18 13:11:31.157 | + local r=1

Seems to be that testresources come out with 2.0.0 version which causes the problem