Update postgresql instructions with a few fixes.
Update postgresql instructions with a few fixes.

I moved the section about pg_hba before the config since the changes are
required in order to log into the db.  Also fixed the pg_hba line.

Signed-off-by: Ian Main <87edab3227c32093d388ed00258c1a5e63cfd715@redhat.com>

aeolusproject/conductor,aeolusproject/conductor,aeolusproject/conductor,aeolusproject/conductor