Enhance the validation of the quotas update

Need force to update quota in tempest test cases, the related commit is
https://review.openstack.org/#/c/25887/

Temporary disable the testcases in test_quota

Fix bug 1160749

Change-Id: Idc13bd24c4b63e707ee5c8b58b4862ba0be1e407
Merge "Enhance the validation of the quotas update"