[Java] Use io.joynr.mqtt.mqtt-client 0.0.6
[Java] Use io.joynr.mqtt.mqtt-client 0.0.6

Change-Id: I715b42bcf1ce113f4af645f03f6f7b1dfb3e5237

bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr