Mirror opensuse emergency update channel

With $DIB_DISTRIBUTION_MIRROR being set, it expects an update
channel for tumbleweed distribution as well. Given that there
is an emergency update channel (that is usually empty), we
can use that one to resolve issues with the nodepool image
building.

Change-Id: I5f786d16f26bfb836d37a740f8490d81076cdfbb

modules/openstack_project/files/mirror/opensuse-mirror-update.sh

@@ -61,6 +61,20 @@ $K5START rsync -rlptDvz \
     --exclude="i586" \
     $MIRROR/$REPO/repo/oss/ $BASE/$REPO/repo/oss/
 
+REPO=update/tumbleweed
+if ! [ -f $BASE/$REPO ]; then
+    $K5START mkdir -p $BASE/$REPO
+fi
+
+date --iso-8601=ns
+echo "Running rsync distribution $REPO ..."
+$K5START rsync -rlptDvz \
+    --delete --stats \
+    --delete-excluded \
+    --exclude="i586" \
+    rsync://rsync.opensuse.org/buildservice-repos-main/openSUSE:/Factory:/Update/standard/ \
+    $BASE/$REPO
+
 date --iso-8601=ns | $K5START tee $BASE/timestamp.txt
 echo "rsync completed successfully, running vos release."
 k5start -t -f /etc/afsadmin.keytab service/afsadmin -- vos release -v $MIRROR_VOLUME