Add pglogical to the shared preload libraries before upgrade
Add pglogical to the shared preload libraries before upgrade

Not having this was causing us to fail when trying to enable the
extension during the upgrade (because the extension was enabled
in the previous database)

It is safe to assume the structure of the default postgres.conf
and change it as we need to because we will overwrite it later
with the user's postgres.conf anyway.

https://bugzilla.redhat.com/show_bug.cgi?id=1391693

ManageIQ/manageiq-appliance,ManageIQ/manageiq-appliance,ManageIQ/manageiq-appliance