LVM-activate: return OCF_NOT_RUNNING on initial probe

In the use case of lvm on top of cluster md/raid. When the fenced node
rejoins to the cluster, Pacemaker will run the monitor action for the
probe operation. At that time, LVM PV and VG won't exist before cluster
md/raid get assembled, and the probe should return $OCF_NOT_RUNNING
instead of $OCF_ERR_CONFIGURED.

Signed-off-by: Roger Zhou <zzhou@suse.com>