Increase volumes quota for service project

If we are backing glance with cinder, we will use more volumes and
if timing is right, we will clash with other tests and be unable
to create what we need. If we are backing glance with cinder, we
should increase the volumes quota, which this patch does (to 50 from
a default of 10).

Closes-Bug: #1914665
Change-Id: I2ad1c4d21f996ee1a9ce29ba4f1a4b8f5720f8fb
1 file changed