This reverts commit 982e3754a5755cc227552b6f1fcc195e8793589c.
"Add default reject rule end in Postgres pg_hba.conf to ensure all
connections must be explicitly allowed."
The original commit introduced a breaking change when installing with
the chart defaults - before, all remote connections with md5 auth were
allowed, and after the change, only explicit users are allowed.
This is fully overridable, but the original defaults are more
conservative.
Change-Id: Ib297e480bccd3ac7c0cf15985b3def2c8b3e889e
20288319af