Searching for both py and pyc file to start super vdsm

In oVirt Node we don't keep py files.

Change-Id: I36771ce46f5d00ad8befe33569252bdb8cffeaa1
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/10854
Reviewed-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>