tools (common/data_objects): added __iter__ to Identities

sat/tools/common/data_objects.py

@@ -379,10 +379,13 @@ class Identity(object):
             raise AttributeError(key)
 
 
-class Identities(object):
+class Identities:
     def __init__(self):
         self.identities = {}
 
+    def __iter__(self):
+        return iter(self.identities)
+
     def __getitem__(self, jid_str):
         try:
             return self.identities[jid_str]