At present, the ownership of pg_hba.conf is hardwired to be uid 0. It should have the same ownership as all of the other postgressql configuration files in the same cluster so that they can be managed/edited by the postgres role user (system) account.
This work converts all the tests over to beaker. Some things are
done slightly different in beaker, we rely much more heavily on
catch_failures rather than explicitly laying out the exit codes we
want but I have attempted to preserve the spirit of all tests.
