Services monitoring dashboard

A Nuxeo "gadget" was created to introduce the idea of monitoring the SOA model.

Thanks to the Discovery by Monitoring component, we are able to provide information to the model on calls to services. Currently, the component notifies Nuxeo of how many times each service has been called: this can be used to store the total call counts, and display them as a simple widget.

The gadget can be accessed from "Home" tab > Add a Widget > Utilities > Service Stats.