Allow postgres and postgres-geo to config an address for TCP support

What does this Merge Request do?

• Adds host configuration to postgres and postgres.geo
• Generates database_geo.yml based on ERB template (and uses configured host and port correctly)
• Fix all Makefile targets that were previously using dir instead of host to connect to the database
• Added postgresql/geo/port to reflect port changes to postgresql-geo
• Added postgresql/geo-fdw/rebuild to easily trigger rebuild on both environments

Merge Request checklist

• Tests added for new functionality. If not, please raise Issue to follow-up.
• This change is backward compatible. If not, please include steps to communicate to our users.
• Documentation added/updated, if needed.
• gdk doctor test added, if needed.

Closes #767 (closed)