Updated the kafka symfony configuration

Author: dheineman

pkg/rdkafka/Symfony/RdKafkaTransportFactory.php

@@ -39,14 +39,17 @@ public function addConfiguration(ArrayNodeDefinition $builder)
                     return ['dsn' => $v];
                 })
             ->end()
-            ->fixXmlConfig('topic')
             ->children()
                 ->scalarNode('dsn')
                     ->info('The kafka DSN. Other parameters are ignored if set')
                 ->end()
-                ->variableNode('global')->defaultValue([])->end()
-                ->arrayNode('topics')
-                    ->prototype('scalar')->end()
+                ->variableNode('global')
+                    ->defaultValue([])
+                    ->info('The kafka global configuration properties')
+                ->end()
+                ->variableNode('topic')
+                    ->defaultValue([])
+                    ->info('The kafka topic configuration properties')
                 ->end()
                 ->scalarNode('dr_msg_cb')
                     ->info('Delivery report callback')