Merge pull request #598 from quitoque/fix/gcs-rename

Cannot call `$this->delete($this->computePath($sourceKey))` with options['directory'] filled

src/Gaufrette/Adapter/GoogleCloudStorage.php

@@ -256,7 +256,7 @@ public function rename($sourceKey, $targetKey)
 
         try {
             $this->service->objects->copy($this->bucket, $sourcePath, $this->bucket, $targetPath, $object);
-            $this->delete($sourcePath);
+            $this->service->objects->delete($this->bucket, $sourcePath);
         } catch (\Google_Service_Exception $e) {
             return false;
         }