vdsm now reports pid when starting up.

When vdsm starts it now outputs to the vdsm log:
"MainThread::INFO::2013-05-05 11:57:38,609::vdsm::89::vds::(run)
(PID: 14576) I am the actual vdsm..."

Change-Id: I029581f4ab1cc5005a55c0f7ecec8672d08da49e
Bug-Url: https://bugzilla.redhat.com/952089
Signed-off-by: Assaf Muller <amuller@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/14430
Reviewed-by: Giuseppe Vallarelli <gvallare@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>