…er.propagateCauseWithStatus

Addresses comment in PR to change method name tranportIncludeStatusCause to something more descriptive: propagateCauseWithStatus. Updates javadoc to better describe what the propagateCauseWithStatus setting does - including the default behaviour of the method.

Addressing PR feedback, this commit removes the getter from InProcessTransport that is not used in the codebase.

…se with status

To address a PR comment, this commit makes the includeCauseWithStatus field of the InProcessTransport final, and adds a single test case to verify that the cause is propagated properly when configured. The field server of AbstractTransportTest had to be made protected so that it could be nullified in the test case for the after each hook.

This commit addresses PR feedback by adding back a null assertion. Default behaviour for transports is to strip cause from status. So in AbstractTransportTest.clientCancel, server status should have a null cause.

…t.cleanStatus and update javadoc

This commit addresses PR feedback by renaming InProcessTransport.stripCause to InProcessTransport.cleanStatus and updating the javadoc, to better reflect the fact that the status can now optionally include cause.