Updated openstack/openstack
Project: openstack/nova  664f0972b9e1c7f3ca125595645719c9a76a1a08

Use default quota values in test_quotas

There are much copy&paste code in test_quotas of v2 API.
This patch adds default quota values and makes use it for each API test
for the readability.

Change-Id: Ib40a1820ea0db93daf231b3384f203ab0ef696ba