fix another m/r test

Author: Luke Bakken

riak/tests/test_mapreduce.py

@@ -151,7 +151,9 @@ def test_erlang_source_map_reduce(self):
             else:
                 print("test_erlang_source_map_reduce {}".format(e.value))
         if strfun_allowed:
-            self.assertEqual(result, ['2', '3', '4'])
+            self.assertIn('2', result)
+            self.assertIn('3', result)
+            self.assertIn('4', result)
 
     def test_erlang_source_map_reduce_bucket_type(self):
         # Create the object...