hooks: Add hook for ovirt-node boot

Configure VDSM every boot to avoid error
on upgrades which vdsm configuration files might
bring different header/footer versions.
Requires http://gerrit.ovirt.org/#/c/28953/

Change-Id: I793d21768c103547cd8082e5353c074245c54535
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1101215
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>