WIP
Merge remote-tracking branch 'origin/master' into fail_on_service_failure

* origin/master:
  Adding sm back in which mysteriously went missing...
Reverted path to fake Nexus
Removed unused code
Added a repository entry for the failingplayest.
YTA-214 Provide success or failure in exit status.

This only affects starting binary services from the sm command line
utility.
Additionally, this will now respect the wait flag, if provided.
YTA-214 Reused basicplayapp for a failing test.
Merge pull request #4 from hmrc/fail_on_service_failure

YTA-214 Provide success or failure in exit status.