New branch for RANGER-274 - support for TAG based policies

[Madhan Neethiraj]

Rangers,

I would like to create a new branch for development of TAG based policies
support - RANGER­274 <https://issues.apache.org/jira/browse/RANGER-274> .
Please respond with one of the following:

    +1: approve
     0: no-opinion
    -1: disapprove. Please provide reason

Thanks,
Madhan