more demo test cases

- added them to cfg/dummy_cfg.py
+ treat enum correctly in SecopClient.setParameterFromString

Change-Id: Ia5b2d8d3a21c3215cb93d90975086eb9995b1543

frappy/client/__init__.py

@@ -734,7 +734,7 @@ class SecopClient(ProxyClient):
         """
         self.connect()  # make sure we are connected
         datatype = self.modules[module]['parameters'][parameter]['datatype']
-        value = datatype.from_string(formatted)
+        value = datatype.export_value(datatype.from_string(formatted))
         self.request(WRITEREQUEST, self.identifier[module, parameter], value)
         return self.cache[module, parameter]