migration from osp 10 -> 11 -> 12 fails because migration script 22 is not idempotent

[Ade Lee]

This is described in https://bugzilla.redhat.com/show_bug.cgi?id=1569605

Basically, the fix for https://bugzilla.redhat.com/show_bug.cgi?id=1541142 was backported to pike and queens and included the migration script #22 (renamed to #17 and #5)

On upgrade, we attempt to run script again, and fail because the script is not idempotent.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/563266

[Lance Bragstad (lbragstad)]

We discussed this at length in the keystone channel this morning [0]. Morgan had a suggestion on an effort to make migrations idempotent, though. Thoughts on pursuing that upstream?

[0] http://eavesdrop.openstack.org/irclogs/%23openstack-keystone/%23openstack-keystone.2018-04-23.log.html#t2018-04-23T15:50:23

[OpenStack Infra (hudson-openstack)]

Change abandoned by Ade Lee (<email address hidden>) on branch: master
Review: https://review.openstack.org/563266
Reason: Seems folks do not want to backport data migrations.

[Ade Lee (alee-3)]

This only happens because we tried to backport a fix downstream, and upstream has chosen not to backport this fix.

Closing as this should not affect upstream.