Add metrics in supervisor

Added basic metrics #87 
@jmyounker @peterbourgon @stuartnelson3 
When someone wants to get the metrics for a container, how is it supposed to find the telemetry addressed? When someone receives events updates, he gets the "ContainerInstance" and my idea was that way he can get the metrics. The telemetry address is container related thing.  I am not sure if here is the right place.