InfluxDB: user measurement as mqttpart if none is given

collectagent/configuration.cpp

@@ -110,6 +110,10 @@ void Configuration::readAdditionalBlocks(boost::property_tree::iptree& cfg) {
 			}
 		    }
 		}
+		if (measurement.mqttPart.size() == 0) {
+		    // if no mqttpart is given, we use the measurement
+		    measurement.mqttPart = MQTTChecker::formatTopic(global.second.data());
+		}
 		influxSettings.measurements[global.second.data()] = measurement;
 	    }
 	}