* Upgrade to Gradle 4.7 and others, polishing build * Fix `MqttAdapterTests` according requirement of the latest Mockito * Move `int-derby.properties` to the `/resources` from `/java` * Fix Checkstyle violations
* Upgrade to Gradle 4.7 and others, polishing build * Fix `MqttAdapterTests` according requirement of the latest Mockito * Move `int-derby.properties` to the `/resources` from `/java` * Fix Checkstyle violations