container/Containerfile: replace CEPH_VERSION var for backward compat

CEPH_VERSION used to be present in the env to hold the ref.  Other projects
relied on this.  Make life easier for them.

Signed-off-by: Dan Mick <[email protected]>

Author: dmick

container/Containerfile

@@ -212,6 +212,7 @@ RUN rpm -q $(cat packages.txt) && rm -f /var/lib/rpm/__db* && rm -f *packages.tx
 # Set some envs in the container for quickly inspecting details about the build at runtime
 ENV CEPH_IS_DEVEL="${CI_CONTAINER}" \
     CEPH_REF="${CEPH_REF}" \
+    CEPH_VERSION="${CEPH_REF}" \
     CEPH_OSD_FLAVOR="${OSD_FLAVOR}" \
     FROM_IMAGE="${FROM_IMAGE}"