Add OpenStack trove classifier for PyPI
Add OpenStack trove classifier for PyPI

Add trove classifier to have the client listed among the
other OpenStack-related projets on PyPI.

Change-Id: Ia37256fb8eb10e3e0e3943f1ccae4344a6ed97de
Signed-off-by: Doug Hellmann <8c845c26a3868dadec615703cd974244eb2ac6d1@dreamhost.com>

redhat-openstack/python-neutronclient,redhat-openstack/python-neutronclient