Fix up wrapper xmls with Python3 porting.

wrappers/classes/http_client.xml

@@ -85,6 +85,9 @@
                         <parameter name="socket"/>
                         <parameter name="data"/>
                         <script>
+                            if sys.version_info[0] > 2:
+                                if isinstance(data, bytes):
+                                    data = data.decode()
                             self.received_data += data
                         </script>
                     </transition>

wrappers/modelverse_SCCD.xml

@@ -15,7 +15,7 @@
 
         try:
             from urllib.parse import urlencode as urlencode
-        except ModuleNotFoundError:
+        except Exception:
             from urllib import urlencode as urlencode
     </top>