Add a MQTT interactive shell that can connect, disconnect, subscribe,
publish, read published messages and ping to the MQTT gateway.
Origin: Original
Jira: ZEP-364
Change-Id: Ie85e7b8b9290cb8e80548886aea74a8427b2323b
Signed-off-by: Flavio Santes <flavio.santes@intel.com>
Flavio Santes