Merge tag 'sparks-2.3.4' into develop

2.3.4
move the update/restart attributes first assignment to __init__, in case the supervisor helper is run in fast mode.
comments at the right place.
Missing comments in django tasks.
remove the "please implement celery…" message, it should be done. I think I forgot to remove it earlier.
Don't forget to restart the 'flower' celery role, and make the process working for any celery worker role, even if they are on the same machine. Fix an alias.
More informative message in case of no role in current context.
Don't forget gettext, else l10n catalogs are not compiled on remotes.
add some cool base packages not present in LXCs base templates.
bump version in setup.py
Merge branch 'release/2.3.5'