Trigger an event when a cluster starts
Trigger an event when a cluster starts

This will be bound in the mongochemserver plugin, so that we can
check the docker images on the cluster when it starts.

Signed-off-by: Patrick Avery <743342299f279e7a8c3ff5eb40671fce3e95f13a@kitware.com>

Kitware/cumulus,Kitware/cumulus