Online data migrations are necessary for performing an upgrade of
ironic. Without this change, an error such as the following may be seen
in task 'bifrost-ironic-install : Upgrade ironic DB Schema'.
The database is not compatible with this release of ironic (10.1.7).
Please run "ironic-dbsync online_data_migrations" using the previous
release.
Change-Id: I685efd14bf3567a126311b676a50b0abb0f043db
Story: 2004670
Task: 28658
(cherry picked from commit 705a58f6eb)