Add a not run state to step, which resolves an issue with junit runner in which features appear to pass if an errors occurs during handler creation
Don't serialize Throwable in StepToken, send instead a String stackTrace and exception
Add getters and setters for xml unmarshalling
Changes to execution tokens required for chorus-xml unmarshalling
Work in progress for interprer config PropertySourceMode refactoring
Fix DefaultsConfigSource should always add defaults to meet ConfigSource spec
Add a test for APPEND mode properties
Add a test for token visitor