New test cases for quota tests suite

1) test_admin_sets_quota_for_a_project
   Admin client sets quotas for a primary project
2) test_primary_fails_to_set_quota
   Primary user fails to set quotas with: "403 Forbidden"
3) test_admin_sets_invalid_quota_values
   Admin user tries to set quotas that with invalid
   values. Expected: "400 BadRequest"
4) test_alt_reaches_zones_quota
   Alt user tries to create a zones up untill
   "413 RateLimitExceeded" is raised

Change-Id: I47e8371e55f07afe0dbea95f804f3833f42fa1ef
3 files changed