Initialize supervdsm log before importing other modules

1. When importing configNetwork, it imports libvirtconnection that
initializes it own logger. The setconfig should occurred before the import.
2. Adding log print before each call to supervdsm.

Change-Id: Id3e95736aad91f80851cc50b20f629bf39a20599
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/17199
Reviewed-by: Dan Kenigsberg <danken@redhat.com>