Description of problem:
When I start the CSI certification job [1] for Cinder CSI driver, at least one snapshot remains in CI undeleted.

[1] https://github.com/openshift/release/pull/14243

How reproducible:

Always

Steps to Reproduce:
1. Start the CI job https://github.com/openshift/release/pull/14243
2. After it's done, check the snapshots in CI with `openstack volume snapshot list` command

Actual results:
At least one snapshot remains

Expected results:
There are no snapshots from the CI job