MOTECH-1438: Made it easier to switch the bootstrap config for ITs

This change will allow us to easily use the postgresql bootstrap
configuration during ITs. It also switches the quartz config, so that
psql will be also used for the scheduler.

Change-Id: I78bbd139d897fe9c9b85aeed0e31f49b084cfeb8
Merge "MOTECH-1438: Made it easier to switch the bootstrap config for ITs"