Improve messages in test report when a test completes after the timeout has already fired

Currently when a test action running on an agentvm times out and as a result the post-timeout action handler is running, if the test completes during that period, then the messages in the test report can be confusing. Specifically, the message will look like:

JavaTest Message: Test complete.

result: Error. Agent error: java.lang.Exception: Agent 22 timed out with a timeout of 480 seconds; check console log for any additional details

Furthermore, the test action's section in the report doesn't contain the start and end times of the post-timeout action handler, making it difficult to identify the time at which the timeout occurred.

It would be good to improve the completion message as well as include the start and end time of the timeout action handler in the relevant places of the test report.