Fixed permission grant revoke button text no appearing

apps/metadata/classes.py

@@ -0,0 +1,12 @@
+from django.utils.translation import ugettext_lazy as _
+
+
+class MetadataObject(object):
+    def __init__(self, dictionary):
+        self.dictionary = dictionary
+
+    def __getattr__(self, name):
+        if name in self.dictionary:
+            return self.dictionary.get(name)
+        else:
+            raise AttributeError(_(u'\'metadata\' object has no attribute \'%s\'') % name)