Requirements conflict in Neutron master

[Margaret Frances]

Using community master of everything, via devstack, (all fetched on 9/17), running

 ```openstack —debug —help```

produced tracebacks, each of which looked like this:

```Could not load EntryPoint.parse('volume_unset = openstackclient.volume.v1.volume:UnsetVolume')
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/cliff/help.py", line 22, in __call__
    factory = ep.load()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2354, in load
    self.require(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2371, in require
    items = working_set.resolve(reqs, env, installer)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 844, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
VersionConflict: (python-neutronclient 3.0.0 (/usr/local/lib/python2.7/dist-packages), Requirement.parse('python-neutronclient<3,>=2.6.0’))```

In ./neutron/requirements.txt I see:

 ```python-neutronclient<3,>=2.6.0```

but in ./requirements/global-requirements.txt:

```# OpenStack clients. None of these should have an upper bound
# as that has implications for testing in the gate. An exception
# is currently being made for neutron client because of the need
# for an incompatible change in their next release.
...
python-neutronclient>=2.6.0```

and in ./requirements/upper-constraints:

``python-neutronclient===3.0.0```

[Akihiro Motoki (amotoki)]

requirements.txt update in neutron repository was merged on Sep 12, 2015.
I think you didn't update neutron in devstack.