vzctl start: do not remount fs if we try restore first

When vzctl start tries to restore a CT, it mounts it first,
then, if restore fails, it unmounts and then tries to start
and mounts again.

Introduce SKIP_UMOUNT and SKIP_REMOUNT flags and use them
to skip unecessary remount.

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
6 files changed