[COMMITTERS] pgsql: Apply RLS policies to partitioned tables.

Apply RLS policies to partitioned tables.

The new partitioned table capability added a new relkind, namely
RELKIND_PARTITIONED_TABLE. Update fireRIRrules() to apply RLS
policies on RELKIND_PARTITIONED_TABLE as it does RELKIND_RELATION.

In addition, add RLS regression test coverage for partitioned tables.

Issue raised by Fakhroutdinov Evgenievich and patch by Mike Palmiotto.
Regression test editorializing by me.

Discussion: https://postgr.es/m/flat/20170601065959.1486.69906@wrigleys.postgresql.org

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/4f7a95be2c112bdc8da5f7e46cbb743b8ba4cc21

Modified Files
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src/backend/rewrite/rewriteHandler.c      |   3 +-
src/test/regress/expected/rowsecurity.out | 428 ++++++++++++++++++++++++++++++
src/test/regress/sql/rowsecurity.sql      | 142 ++++++++++
3 files changed, 572 insertions(+), 1 deletion(-)