Updates monit test to explicitly start process (vi) rather than assume '...

...cron' is running, uses 'rest of line' for status, rather than next word
Personal preference would be to have used a filename that included a random id, to ensure that tests can never interfere with each other. But this should be ok, as our tests are not run in parallel and tearDown looks ok (as long as `super.tearDown` doesn't throw an exception, given it's not in a try-finally block!)