UTF-8 encode ddoc unicode strings in Py2

Author: smithsz

src/cloudant/_common_util.py

@@ -283,7 +283,7 @@ class _Code(str):
     codifying map and reduce Javascript content.
     """
     def __new__(cls, code):
-        if isinstance(code, unicode):
+        if type(code).__name__ == 'unicode':
             return str.__new__(cls, code.encode('utf8'))
         return str.__new__(cls, code)