B-60837: Added logic to bypass tenant check in authz.
B-60837: Added pass for filter.
B-60837: Added logic for x-roles header.
B-60837: Added tests for new logic.
B-60837: Simplified line.
B-60837: Removed token validation and caching logic. Changed tests. Removed duplicate code. Changed logic to account for many headers of the same name.
B-60837: Ported most auth-z junit tests to groovy.
B-60837: Ported most auth-z junit tests to groovy.
B-60837: Ported rest of auth-z junit tests to groovy. Changed config value name and made changes to java variable names to reflect this.
Merge pull request #907 from rackerlabs/B-60837

B-60837: Non-Tenanted AuthZ