Try to fix mysql crash on close by rolling back mysqlclient.

The version was incremented from 1.3.13 to 1.3.14.

Can't move forward to 1.4 series since 1.4 series drops support for
python 3.4.

Author: rouilj

roundup/rest.py

@@ -1450,7 +1450,7 @@ def dispatch(self, method, uri, input):
             output = RoundupJSONEncoder(indent=indent).encode(output)
         elif data_type.lower() == "xml" and dicttoxml:
             self.client.setHeader("Content-Type", "application/xml")
-            output = dicttoxml(output, root=False)
+            output = b2s(dicttoxml(output, root=False))
         else:
             self.client.response_code = 406
             output = "Content type is not accepted by client"