Fixes #789 - pass the full query to the executor

Currently, the operationName is not passed to the executor. By passing the full query, both the id and the operationName will be passed.

Author: edhgoose

src/Controller/GraphController.php

@@ -135,7 +135,7 @@ private function processBatchQuery(Request $request, $schemaName = null)
 
         foreach ($queries as $query) {
             $payload = $this->requestExecutor
-                ->execute($schemaName, ['query' => $query['query'], 'variables' => $query['variables']])
+                ->execute($schemaName, $query)
                 ->toArray();
             if (!$this->useApolloBatchingMethod) {
                 $payload = ['id' => $query['id'], 'payload' => $payload];