Med: Allow LVM return codes to work with Pacemaker

rgmanager treated any non-zero code as an error. Unfortunately,
Pacemaker relies on correct OCF_NOT_RUNNING return codes in the
case that a resource is cleanly stopped.

Acked-by: Ryan McCabe <rmccabe@redhat.com>
Acked-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Lon Hohberger <lhh@redhat.com>