Added FcResponseExternal.java to model the FcResponse we will get from
Cummins.

Added ResponseHandler.java to act as a servlet to catch and act on
response we will get from Cummins.
Fixed a number of properties on FcResponseExternal which were configured
incorrectly.

Added testing functionality to ResponseHandler to map the POST message
to an FcResponseExternal object, then respond with the object rendered
as a JSON string.
mucking around with SSL testing...