More fixes to vocab_test.py

Author: emmanvg

cybox/test/common/vocab_test.py

@@ -139,12 +139,8 @@ def test_add_vocabstring(self):
     def test_to_dict(self):
         from cybox.common.vocabs import ActionName
         d = ActionName(ActionName.TERM_ADD_USER).to_dict()
-        if 'xsi:type' in d:
-            self.assertEqual(d['xsi:type'], ActionName._XSI_TYPE)
-        if 'value' in d:
-            self.assertEqual(d['value'], ActionName.TERM_ADD_USER)
-        else:
-            self.assertEqual(d, ActionName.TERM_ADD_USER)
+        self.assertEqual(d['xsi:type'], ActionName._XSI_TYPE)
+        self.assertEqual(d['value'], ActionName.TERM_ADD_USER)
 
     def test_vocab_is_plain_false(self):
         from cybox.common.vocabs import ActionName