Update CarmaCloudInstance to return response code detail for time syn…

…c failure.

co-simulation/fed/mosaic-carma-cloud/src/main/java/org/eclipse/mosaic/fed/carmacloud/ambassador/CarmaCloudInstance.java

@@ -88,6 +88,6 @@ public void sendTimeSyncMsg(TimeSyncMessage oMsg)
 			oOut.write(new Gson().toJson(oMsg).getBytes());
 		}
 		if (oHttp.getResponseCode() != 200)
-			throw new IOException();
+			throw new IOException(String.format("CARMA Cloud failure %d %s", oHttp.getResponseCode(), oHttp.getResponseMessage()));
 	}
 }