Added a simple heartbeat http monitor service example. Users can use a
browser to get a list of available kinetic services (drives/simulators)
in the response message.

To start the service, under <kinetic-java> folder, run
sh ./bin/heartbeatMonitor.sh

From a browser on the same host, type
http://<localhost>:<8080>

Use an appropriate hostname and port if the service was started on a
different host/port.