Add test for quota set for invalid project

this also adds a feature flag "api_v2_quotas_verify_project" (False by
default) enabling which will enable this test.

Change-Id: Icdc1b9ae419c3634ab2c55005f33fed624706176
Related-Bug: #1760822
(cherry picked from commit 60e5372a46f588633d68d453c829c397363ed7c2)
2 files changed