Remove skip mark to test_create_image_when_server_is_rebooting

There's no reason to skip it anymore

Change-Id: Ibfae1ae7e281dbd0207282dd7e5a244e3cc44f86
Remove quota whitebox tests

The quota limitation are testable by blackbox tests.
These quota tests are skipped because of issues anyway.

Fixing Bug 1034129

Change-Id: Icaeaed3bb5151ce2057ff3e850e3240c38b2ab81
Raise BadRequest if unable to create subnet

The existing create_subnet method iterates over subnets looking for one
that it can use and filters out any errors for overlapping CIDRs. The
problem is if a usable subnet is not found, the code goes on to use an
undeclared variable (body).

This patch saves the last overlapping CIDR exception and raises it if no
usable subnet is found to avoid the undeclared variable usage.

Fixes bug 1186445

Change-Id: I9ba4feada05a65a592bbd04ce8b722200e80b165
actually enable our no tempest/tests check

I'm stupid and forgot to enable this, actually turn it on.

Change-Id: I050334bd0f0e5e282e6485b52aaf1e74eed9c7c9
Merge "Remove quota whitebox tests"
Merge "actually enable our no tempest/tests check"
Merge "Remove skip mark to test_create_image_when_server_is_rebooting"