fix: addiotional log message

Author: csviri

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/informer/InformerEventSource.java

@@ -119,6 +119,9 @@ private synchronized void onAddOrUpdate(String operation, R newObject, Runnable
 
   @Override
   public void onDelete(R r, boolean b) {
+    if (log.isDebugEnabled()) {
+      log.debug("On delete event received for resource id: {}", ResourceID.fromResource(r));
+    }
     super.onDelete(r, b);
     propagateEvent(r);
   }