supporting 2.7, reading works fine, writing reqs unicode

Author: ryphon

config/kube_config_test.py

@@ -1262,7 +1262,12 @@ def test_load_kube_config_from_file_like_object(self):
         expected = FakeConfig(host=TEST_HOST,
                               token=BEARER_TOKEN_FORMAT % TEST_DATA_BASE64)
         config_file_like_object = io.StringIO()
-        config_file_like_object.write(yaml.safe_dump(self.TEST_KUBE_CONFIG))
+        #py3 (won't have unicode) vs py2 (requires it)
+        try:
+            unicode('')
+            config_file_like_object.write(unicode(yaml.safe_dump(self.TEST_KUBE_CONFIG)), errors='replace')
+        except NameError:
+            config_file_like_object.write(yaml.safe_dump(self.TEST_KUBE_CONFIG))
         actual = FakeConfig()
         load_kube_config(config_file=config_file_like_object, context="simple_token",
                          client_configuration=actual)