Simplify condition on new patch-sets

Small refactoring to make the condition on new patch-sets created
simpler and more readable.

Change-Id: I2fd70eb988217cab70296a4d957aec71a0ee88cd
diff --git a/src/main/java/com/criteo/gerrit/plugins/automerge/AutomaticMerger.java b/src/main/java/com/criteo/gerrit/plugins/automerge/AutomaticMerger.java
index 21bf51d..5b222cd 100644
--- a/src/main/java/com/criteo/gerrit/plugins/automerge/AutomaticMerger.java
+++ b/src/main/java/com/criteo/gerrit/plugins/automerge/AutomaticMerger.java
@@ -109,10 +109,9 @@
 
   private void onPatchSetCreated(final PatchSetCreatedEvent event) {
     ChangeAttribute change = event.change.get();
-    if (!atomicityHelper.isAtomicReview(change)) {
-      return;
+    if (atomicityHelper.isAtomicReview(change)) {
+      processNewAtomicPatchSet(change);
     }
-    processNewAtomicPatchSet(change);
   }
 
   private void onCommendAdded(final CommentAddedEvent newComment) {