jewel: fix mon start on demo
jewel: fix mon start on demo

If we start a demo container the mon should not run `exec`, if it does
it'll return 0 and exit and the other daemons won't be able to run.
Let's simply run it on foreground.

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

JrCs/ceph-docker,JrCs/ceph-docker,ceph/ceph-docker,JrCs/ceph-docker,ceph/ceph-docker