add the ability to specify comma separated --task --group
rose app-upgrade: fix HEAD broken macro pathway
Update CHANGES.md
Merge pull request #1200 from benfitzpatrick/rose-app-upgrade.broken-pathway-HEAD-fix-tests

rose app-upgrade: fix HEAD broken macro pathway
Update a test to include comma separated --task and --group lists.
Merge pull request #1197 from steoxley/task_comma_sep

rose stem: allow comma separated --task --group