quantumclient being tested against devstack master rather than devstack stable/grizzly

[Thomas Maddox]

A patch to remove redundant dependencies that are causing gate to fail for grizzly backports [1], which was needed after global requirements was updated to correct another gate blocking bug for upstream [2] is failing at gate now. It appears to be trying to test against devstack master, rather than devstack stable/grizzly. The gate fails when it tries to use a file from the install procedure for neutronclient [3], unlike the install procedure for quantumclient [4], which would be used if it were devstack's stable/grizzly branch.

[1]: https://bugs.launchpad.net/python-neutronclient/+bug/1230397
[2]: https://bugs.launchpad.net/openstack-ci/+bug/1229797
[3]: https://github.com/openstack-dev/devstack/blob/master/lib/neutron#L393-L397
[4]: https://github.com/openstack-dev/devstack/blob/stable/grizzly/lib/quantum#L351-L355