lv_rename: fix snapshot rename

lv_rename: fix snapshot rename

Fix rename operation for snapshot (cow) LV.
Only the snapshot's origin has the lock and by mistake suspend
and resume has been called for the snapshot LV.
This further made volumes unusable in cluster.

So instead of suspend and resuming list of LVs,
we need to just suspend and resume origin.

As the sequence write/suspend/commit/resume
is widely used in lvm2 code base - move it to
new lv_update_and_reload function.