Do not require old version in set-versions.sh

set-versions.sh

@@ -1,5 +1,3 @@
-#!/bin/bash
-
 set -euo pipefail
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
@@ -8,16 +6,16 @@ echo WARNING, this will clean and reset the repository in "$DIR"
 echo Waiting 5 seconds... hit control-C to abort.
 sleep 5
 
-OLD_VERSION=$1
-NEW_VERSION=$2
+NEW_VERSION=$1
 
 cd "$DIR"
 git clean -xdf
 git reset --hard
 
+OLD_VERSION=$(cat inbm/version.txt)
 echo $NEW_VERSION >inbm/version.txt
 
 mv inbm/packaging/yocto/meta-intel-ese-manageability/recipes-inb/inb/inb_{$OLD_VERSION,$NEW_VERSION}.bb
 echo ====
 echo ==== Remember to update inbm/Changelog.md.
-echo ====
+echo ====