Improved simulator download case a bit. Added missing test asserts for

target token in DMF.

Signed-off-by: Kai Zimmermann <kai.zimmermann@bosch-si.com>

examples/hawkbit-device-simulator/src/main/java/org/eclipse/hawkbit/simulator/DeviceSimulatorUpdater.java

@@ -149,6 +149,8 @@ public class DeviceSimulatorUpdater {
                     eventbus.post(new ProgressUpdate(device));
                     return;
                 }
+                // download is 80% of the game after all
+                device.setProgress(0.8);
             }
 
             final double newProgress = device.getProgress() + 0.2;
@@ -272,6 +274,10 @@ public class DeviceSimulatorUpdater {
         }
 
         private static String hideTokenDetails(final String targetToken) {
+            if (targetToken == null) {
+                return "<NULL!>";
+            }
+
             if (targetToken.isEmpty()) {
                 return "<EMTPTY!>";
             }