They are failing thanks to sqlalchemy.orm.exc.DetachedInstanceError:
Parent instance <ClusterVerification at ...> is not bound to a Session;
lazy load operation of attribute 'checks' cannot proceed
(Background on this error at: http://sqlalche.me/e/bhk3)
The issue seems to be difficult to tackle, so let's reevaluate after
cutting Ussuri branches.
Story: 2007450
Task: 39508
Change-Id: If0b47fa815ef778d58542f4c7d84218aef833802
c33675508c