[COMMITTERS] pgsql: Add explicit ORDER BY to a few tests that exercise hash-joincod

Add explicit ORDER BY to a few tests that exercise hash-join code.

A proposed patch, also by Thomas and in the same thread, would change
the output order of these.  Independent of the follow-up patches
getting committed, nailing down the order in these specific tests at
worst seems harmless.

Author: Thomas Munro
Discussion: https://postgr.es/m/CAEepm=1D4-tP7j7UAgT_j4ZX2j4Ehe1qgZQWFKBMb8F76UW5Rg@mail.gmail.com

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/7c5d8c16e12e56c1043ff4a28e07a306a15c2b85

Modified Files
--------------
src/test/regress/expected/join.out        | 94 ++++++++++++++++---------------
src/test/regress/expected/rowsecurity.out | 14 ++---
src/test/regress/sql/join.sql             |  6 +-
src/test/regress/sql/rowsecurity.sql      |  4 +-
4 files changed, 62 insertions(+), 56 deletions(-)