oop: Use Storage.oop logger

Use storage logger to avoid oop logs in /var/log/messages.
Storage logger is configured to not send messages to syslog.

Change-Id: Id2d0474d1d69e227aa12b8b70022930f66e7387d
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1131867
Signed-off-by: Yeela Kaplan <ykaplan@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/31908
Reviewed-by: Dima Kuznetsov <dkuznets@redhat.com>
Reviewed-by: mooli tayer <mtayer@redhat.com>
Reviewed-by: Saggi Mizrahi <smizrahi@redhat.com>
Reviewed-by: Nir Soffer <nsoffer@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>