Proposal for patching SonarQube rule 4973

Signed-off-by: henry-lp <tailp@kth.se>

Author: henry-lp

org.eclipse.paho.sample.mqttclient/src/main/java/org/eclipse/paho/sample/mqttclient/mqttv3/MqttV3Connection.java

@@ -69,7 +69,7 @@ public MqttV3Connection(CommandLine cliOptions) throws URISyntaxException {
 
 
 		// If the client ID was not set, generate one ourselves
-		if (clientID == null || clientID == "") {
+		if (clientID == null || clientID.equals("") ) {
 			// No client ID provided, generate one from the process ID
 			long pid = Thread.currentThread().getId(); //ProcessHandle.current().pid();
 			clientID = "mqtt-client-" + pid;