统一library返回countItem

app/Http/Controllers/API/LibraryController.php

@@ -112,7 +112,7 @@ class LibraryController extends Controller
             // 设置固定的type值
             $libraries->type = 'library';
             $libraries->uniId=uniqid();
-            $libraries->container_count=$libraries->container()->count();
+            $libraries->containerCount=$libraries->container()->count();
             });
 
         return $this->success([