remove python-glanceclient cap

if any of the projects specify a capped client, it has the
potential for preventing that client from being tested in the
gate. To fix this we have to uncap maximum versions of all
openstack client code in all openstack projects.

(Note Neutronclient needs special dispensation for now, so
it is left capped.)

(Rebased after a neutron rename landed)

Fixes bug #1200214

Change-Id: I0168cb645279a819942a442c800afb1d0336203c
Merge "remove python-glanceclient cap"