Bump barbican-tempest-plugin to 1.2.1 in Train
Bump barbican-tempest-plugin to 1.2.1 in Train

The new release includes fixes and new tests.

It requires a backport to restore Python2 compatibility.

Depends-On: https://review.rdoproject.org/r/c/openstack/barbican-tempest-plugin-distgit/+/32725
Change-Id: I7422a00724c5c84c4b13ef959979f75987c92542

redhat-openstack/rdoinfo