containers: work around changes to ceph ci container build process

Recent changes to the ceph ci images are removing the repo files, as
well as some other minor changes. We're working with ceph maintainers
to come up with a clean solution for all, but in the meantime
re-installing the ceph-release rpm recreates the file we need to
continue.

Signed-off-by: John Mulligan <jmulligan@redhat.com>

testing/containers/ceph/Dockerfile

@@ -9,9 +9,11 @@ ARG GO_CEPH_VERSION
 ENV GO_CEPH_VERSION=${GO_CEPH_VERSION:-$CEPH_VERSION}
 
 RUN true \
+    && if [ -z "${CEPH_VERSION}" ]; then CEPH_VERSION="${CEPH_REF}"; fi \
     && echo "Check: [ ${CEPH_VERSION} = ${GO_CEPH_VERSION} ]" \
     && [ "${CEPH_VERSION}" = "${GO_CEPH_VERSION}" ] \
     && (. /etc/os-release ; if [ "$ID" = centos -a "$VERSION" = 8 ]; then find /etc/yum.repos.d/ -name '*.repo' -exec sed -i -e 's|^mirrorlist=|#mirrorlist=|g' -e 's|^#baseurl=http://mirror.centos.org|baseurl=https://vault.centos.org|g'  {} \; ; fi ) \
+    && if [ ! -f /etc/yum.repos.d/ceph.repo ]; then yum reinstall -y "$(curl -fs "https://shaman.ceph.com/api/search/?project=ceph&distros=centos/9/x86_64&flavor=default&ref=${CEPH_REF}&sha1=${CEPH_SHA:-latest}" | jq -r .[0].url)/noarch/ceph-release-1-0.el9.noarch.rpm"; fi \
     && yum install -y \
         git wget /usr/bin/curl make \
         /usr/bin/cc /usr/bin/c++ gdb \