Initial commit for the integration testing support. We can now verify a
message beeing sent and received
Added better failure descrioptions to the integration tests
Making sure that we unload appdomains after each test
Added a way to override the transport connectionstring
The integration tests now execute for all transports
Renamed scenarios to behaviours for the integration tests
Added possibility to add a context to each behavior
Using spin waiting
Added ability to describe scenarios and pass settings to the endpoint template.
Ability to define scenario, remove NUnit dependency, stopping endpoints
Upgraded to latest Autofac. #907
Adding support for nested runs so that we can create permutations