B 55821 - API Validator supports use-rax-roles 

1. Added new flag to api validator cfg - use-rax-roles, defaulted to false, optional
2. Updated api-checker release to 1.0.12 - new feature supports rax:roles in the WADL
3. Modified API Validator to support new config flag and passing of the right option to api-checker
4. Created functional tests that test this new feature in Repose