* Fix Bug 202162 - JUnit messages says failed first but it is not

- fix TestRunnerViewPart.prepareLaunchConfigForRelaunch() to strip
  the failed first part of a message as we are just rerunning
- also set the ATTR_FAILURES_NAMES to null instead of empty string
  so when we do failed first again we will create the proper
  message and do not add the Rerun to start of message as we do this
  inconsistently (only added after a failed run then rerun)
- fixes #1434