Merge branch '5.3' into 5.4

* 5.3:
  Fix iterrator in ServiceConfigurator
  Add Slovak lang translation #41081
  [Validator] Add missing thai translation
  [Translation] Add Burmese translation
  [Notifier] Update FirebaseTransport.php
  [FrameworkBundle] Remove translation data_collector BEFORE adding it to profiler

Author: derrabus

Loader/Configurator/AbstractServiceConfigurator.php

@@ -32,8 +32,8 @@ public function __destruct()
     {
         // default tags should be added last
         foreach ($this->defaultTags as $name => $attributes) {
-            foreach ($attributes as $attributes) {
-                $this->definition->addTag($name, $attributes);
+            foreach ($attributes as $attribute) {
+                $this->definition->addTag($name, $attribute);
             }
         }
         $this->defaultTags = [];