ci: unset -e on expected failure
ci: unset -e on expected failure

It is expected that "git describe --exact-match HEAD --tags --long"  can
fail so we don't want to exist on an error. For this we unset -e then
re-activate it.

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

JrCs/ceph-docker,JrCs/ceph-docker,ceph/ceph-docker,ceph/ceph-docker,JrCs/ceph-docker