Merge quotas clients

The quotas clients admin and "non-admin" part using the same base url.
The flavors client not broken into pieces, the quotas client should not be
different.

The Compute Admin tests will be able to use a non-admin account
for negative tests.

Change-Id: I0c358f791b250feb50fffcfc059d7e62c3d506b6
11 files changed