Process:
[x] Stop puppet on mw* (that includes task)
[] Depool mw11
[x] stop jobrunner on mw11
[] delete /srv/mediawiki/w & /srv/mediawiki/config on mw11
[] merge puppet patches for cleaning everything up & setting staging on mw11
[] run puppet on mw* (mw* should be fairly no-op except 11 which will setup staging)
[] deploy-mediawiki --world --gitinfo --config --l10n --servers=skip (fully sync mw11, ensure it is up)
[] deploy-mediawiki --world --gitinfo --config --l10n --servers=all (hopefully it will pass)
[] repool mw11