opalis: trigger policy fails in the testing console

don't be alarmed if you find that while testing nested workflows, the testing console generates an error when it hits the "trigger policy" object.  this is "by design" as the testing console is only designed to test a single policy instance. 

it's referenced in this forum post: http://social.technet.microsoft.com/Forums/en-GB/opalisv5v6/thread/b9ac5928-f4b5-4160-ba60-00f683614426