In change I1e71150ba6daeba464b6ed8d46163f1f34959db3 we removed the
legacy base test classes, first deprecated in 2015. We forgot to include
a release note, however. Address this now.
Change-Id: I4d66f0308b89a187143ef6c8495383fe60043c14
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>