Reordered shutdown routine.
Merge pull request #649 from arjclark/shutdown-fix

rose suite-shutdown: fix order of args to cylc shutdown
rosie go: fix null copy reporting
rosie go: refactor change
Merge pull request #650 from benfitzpatrick/rosie-go.fix-null-copy

rosie go: fix null copy crash reporting
Merge branch 'master' into gh-pages