fix for R4 Compatibility

PR: https://github.com/eclipse/smarthome/pull/1331

Signed-off-by: Benedikt Niehues <b.niehues@external.telekom.de>

bundles/automation/org.eclipse.smarthome.automation.providers/src/main/java/org/eclipse/smarthome/automation/internal/core/provider/AutomationResourceBundlesEventQueue.java

@@ -110,7 +110,7 @@ class AutomationResourceBundlesEventQueue implements Runnable, BundleTrackerCust
         this.mProvider = mProvider;
         this.rImporter = rImporter;
         bTracker = new BundleTracker<Object>(bc, ~Bundle.UNINSTALLED, this);
-        pkgAdmin = bc.getService(bc.getServiceReference(PackageAdmin.class));
+        pkgAdmin = (PackageAdmin) bc.getService(bc.getServiceReference(PackageAdmin.class.getName()));
     }
 
     /**