SENTRY-390: Extend Thrift API to support column-level privilege
SENTRY-390-thrift-part-Extend-Thrift-API-to-support-
SENTRY-393-Grant-Revoke-and-Show-Grant-info-support
SENTRY-392-Authorization-for-column-level-security
SENTRY-394-PolicyFile-and-ConfigImport-support-for