Revert "Workaround broken Neutron requirements."

This reverts commit 4c16ec1eca50e2e5f561420141ad268c2970c99e.

Neutronclient has been released.

Change-Id: I99470efbb51ff95bcf0346209c04cdab45c1e2b6
Merge "Revert "Workaround broken Neutron requirements.""