Some transient errors can ultimately cause the client to need to be
completely restarted due to cached connection data.
Ironic now explicitly removes the cache entry when a sushy
AccessError or python AttributeError is detected originating
from the library. This will now result in the prior cached connection
object to be discarded, and upon the next attempt to interact with
the same node, a new connection will be launched.
This will result in new sessions being created, but in all likelihood
the prior session had already timed out or had been administratively
removed. Sushy's code, as of
https://review.opendev.org/c/openstack/sushy/+/820076
will raise SessionService lookup access errors as AccessErrors.
Prior to that change, they should have been raised as AttributeError
as the previous call sould have returned None to be used as an object.
Change-Id: Icc6e5dd74d9f15e679a7e764fe49238ed6b8dc1e
Story: 2009719
Task: 44107