Add missing NO_INSTALLCHECK in commit_ts and test_rls_hooks

Add missing NO_INSTALLCHECK in commit_ts and test_rls_hooks

This bypasses installcheck if specified, which makes sense for those
modules as they require non-default configuration, something which
typical users don't have.  Those have been missing from the start, still
no back-patch is done.

This will be used by an upcoming patch for MSVC scripts adding support
for NO_INSTALLCHECK as installcheck is the default mode for contrib and
modules for performance reasons in the buildfarm.

Author: Michael Paquier
Reviewed-by: Andrew Dunstan
Discussion: https://postgr.es/m/20181126054302.GI1776@paquier.xyz