SENTRY-380: Clean up some grantorPrincipal semantics (Sravya Tirukkovalur via Prasad Mujumdar)
SENTRY-443: Show roles regressed after Sentry-417. (Sravya Tirukkovalur via Prasad Mujumdar)
SENTRY-441: Improve the message for SemanticException (Sravya Tirukkovalur via Prasad Mujumdar)
SENTRY-446: Missing comma in mysql 1.5 script (Sravya Tirukkovalur via Prasad Mujumdar)
SENTRY-359: Support Sentry service API to retrieve applicable privileges for a given authorizable object (Prasad Mujumdar via Arun and Sravya)
Merge remote-tracking branch 'upstream/master'