[bongo]add initial bongo sensu check
[bongo]add initial bongo sensu check

This wil do the foolowing:

* query the mesos master using the consul dns for the location of the bongo app
* query the bongo app for all metrics
* return the metric to stdout

yieldbot/sensu-yieldbot-plugins,yieldbot/sensu-yieldbot-plugins,yieldbot/sensu-yieldbot-plugins