Always try to stop the container if it is not stopped
Always try to stop the container if it is not stopped

After some discussion, it seems both safe and desired to re-send the stop
command if things are not in the stopped state, and simply wait for that
command to finish as a signal that the container is actually stopped.

Signed-off-by: Tycho Andersen <10c18fcb898ee6b17d6575d444b125d10b3f4d6a@canonical.com>

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