Match unit test field to updated field name.

co-simulation/fed/mosaic-carma-cloud/src/test/java/org/eclipse/mosaic/fed/carmacloud/ambassador/CarmaCloudRegistrationReceiverTest.java

@@ -78,7 +78,7 @@ public void testMessageReceive() throws Exception {
 
          // Setup the registration receiver
          CarmaCloudRegistrationReceiver receiver = new CarmaCloudRegistrationReceiver();
-         FieldSetter.setField(receiver, receiver.getClass().getDeclaredField("m_oSrvr"), MockServer);
+         FieldSetter.setField(receiver, receiver.getClass().getDeclaredField("srvr"), MockServer);
          receiver.run(); // multi-threading not needed here
 
          // Verify that the message was received correctly