Merge pull request #1579 from tiagojsag/fix_items_add

item_adds bug fix

DependencyInjection/Compiler/AddDependencyCallsCompilerPass.php

@@ -101,7 +101,7 @@ class AddDependencyCallsCompilerPass implements CompilerPassInterface
                 }
 
                 if (!empty($group['item_adds'])) {
-                    $group['items'] = array_merge($groupDefaults[$groupName]['items'], $group['item_adds']);
+                    $groups[$groupName]['items'] = array_merge($groups[$groupName]['items'], $group['item_adds']);
                 }
             }
         } else {