add delorean element for building overcloud images

elements/delorean/extra-data.d/10-delorean-repo

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -eux
+set -o pipefail
+
+DELOREAN_REPO=${DELOREAN_REPO:-""}
+
+if [ -z "$DELOREAN_REPO" ]; then
+    echo \$DELOREAN_REPO must be set
+    exit 1
+fi
+
+sudo curl -o $TMP_MOUNT_PATH/etc/yum.repos.d/delorean.repo $DELOREAN_REPO
+

instack-sourcerc

@@ -178,5 +178,5 @@ use-ephemeral \
 
 if [ "$DELOREAN" = "1" ]; then
     export DIB_COMMON_ELEMENTS=${DIB_COMMON_ELEMENTS:-""}
-    export DIB_COMMON_ELEMENTS="$DIB_COMMON_ELEMENTS undercloud-package-install"
+    export DIB_COMMON_ELEMENTS="$DIB_COMMON_ELEMENTS delorean undercloud-package-install"
 fi