Add more audit data to HBase grant/revoke events

Currently RangerAuthorizationCoprocessor correctly captures all data from HBase grant and revoke events, but RangerBasePlugin only copies certain fields to RangerAccessEvent.

RequestData is one the fields which are copied to the final entity and currently not being used by the co-processor. I'd like to add some missing information to this field and make it available on the UI similarly how Hive queries are shown in a small pop-up.

First, I change the co-processor to populate RequestData with additional grant/revoke information.

Second, I modify JS to show the RequestData pop-up on HBase audit events too.