B-57862 Added PATCH to the rate-limiting xsd, Added unit tests on the schema
B-57862 Parameterized unit tests
Add configs for new tests.
Add empty skeleton for PATCH method tests.
Add tests for the basic cases.
Add a test for multiple users.
Merge pull request #746 from dmnjohns/B-57862

B-57862 Added PATCH method support to the rate-limiting xsd