Fix deprecated Symfony 3.4 Data Collector without reset method (#174)

Author: francoispluchino

DataCollector/GeocoderDataCollector.php

@@ -33,6 +33,16 @@ public function __construct()
         $this->data['providers'] = [];
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function reset()
+    {
+        $this->instances = [];
+        $this->data['queries'] = [];
+        $this->data['providers'] = [];
+    }
+
     /**
      * {@inheritdoc}
      */