Wrap atomic run/stop with systemctl start/stop for system
containers. This way the user can directly use the atomic
CLI for the full container cycle. In addition, the equivalent
functionality already exists for docker containers, so it
makes sense to allow system containers to start/stop in a
similar fashion.
Signed-off-by: Yu Qi Zhang <jerzhang@redhat.com>
Closes: #651
Approved by: rhatdan