fix xml config handling

Author: dbu

DependencyInjection/Configuration.php

@@ -155,7 +155,6 @@ private function configureClients(ArrayNodeDefinition $root)
     {
         $pluginNode = $root->children()
             ->arrayNode('clients')
-                ->fixXmlConfig('plugin')
                 ->validate()
                     ->ifTrue(function ($clients) {
                         foreach ($clients as $name => $config) {
@@ -168,6 +167,7 @@ private function configureClients(ArrayNodeDefinition $root)
                     ->thenInvalid('A http client can\'t be decorated with both FlexibleHttpClient and HttpMethodsClient. Only one of the following options can be true. ("flexible_client", "http_methods_client")')->end()
                 ->useAttributeAsKey('name')
                 ->prototype('array')
+                ->fixXmlConfig('plugin')
                 ->children()
                     ->scalarNode('factory')
                         ->isRequired()

Tests/Unit/DependencyInjection/ConfigurationTest.php

@@ -209,7 +209,7 @@ public function testSupportsAllConfigFormats()
             return __DIR__.'/../../Resources/Fixtures/'.$path;
         }, [
             'config/full.yml',
-// TODO fix xml config            'config/full.xml',
+            'config/full.xml',
             'config/full.php',
         ]);