Add version constraint for cinder

Cinder client usage requires the "retries" parameter introduced in
cinderclient-1.0.1. This should be a constraint in pip-requires.

Change-Id: I36e8a363c9d4bb7cc4ecfda85644fc4284f17471
Merge "Add version constraint for cinder"
Merge remote-tracking branch 'citrix/master' into build-temp