vzctl snapshot: store/restore CT config on snapshot operations

* on create snapshot copy $CTID.conf to VE_PRIVATE/dump/$UUID.ve.conf
* on switch snapshot resore ve.conf
* on delete snapshot -- delete $UUID.ve.conf

Reference: PSBM-13056
Reference: vzctl@767331
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed