Updated openstack/openstack
Project: openstack/neutron  4973b7f4b54772c75738a4b990136f731439d8a6

Start ping listener also for postgresql

Make use of the automatic connection disposal for
PostgreSQL as well.

oslo-incubator commit: 4a591eaafe035fa3fd508c910f057bfa8ff51005

Change-Id: I6e6adb612968639dbc8deae31e5409aac44e340e
Closes-Bug: 1288438