packaging: Updated cleanup to clean  postgresql 9.2 connections

* Updated the command in common_utils that clears the DB connections.
The difference in 9.2: the field 'procpid' was renamed to 'pid'.

Bug-Url: https://bugzilla.redhat.com/782176
Change-Id: Idfad6d478a647ee91d818f1f377490a29a1a2ddb
Signed-off-by: Alex Lourie <alourie@redhat.com>