SENTRY-496: Sentry 1.5 postgres upgrade script has contains incorrect upgrade file name
SENTRY-355: Support metadata read privilege enforcement for Metastore pluging (Colin Ma via Prasad Mujumdar)
Updating copyright message
SENTRY-426: Add upgrade scripts for column level privileges
SENTRY-389: Database implementation for column
SENTRY-391: Extend sentrystore query for column level privilege
SENTRY-390 Extend Thrift API to support column-level privilege
SENTRY-393 Grant/Revoke and Show Grant info support for column level privilege
SENTRY-392: Authorization for column level security
SENTRY-394 PolicyFile and ConfigImport support for column level privilege