fix builder metadata

Signed-off-by: Matheus Agio Nerone <man13@inf.ufpr.br>

app/builders/learning_object_builder.rb

@@ -32,11 +32,10 @@ class LearningObjectBuilder
           id_dspace: args['id_dspace'],
           type: args['type'],
           bitstreams: args['bitstreams'],
-          metadata: args['metadata'],
-          last_modified: args['last_modified']
+          last_modified: args['last_modified'],
+          metadata: JSON.parse(args['metadata'])
         )
       end
-
       lo.likes = args.key?('in_Likes') ? args['in_Likes'].size : 0
       lo.views = args.key?('in_Views') ? args['in_Views'].size : 0
     end