Factory/upgrade-controller-image/_service

<services>
  <service mode="buildtime" name="kiwi_metainfo_helper"/>
  <service name="replace_using_env" mode="buildtime">
    <param name="file">Dockerfile</param>
    <param name="eval">IMG_PREFIX=$(rpm --macros=/root/.rpmmacros -E %{?img_prefix})</param>
    <param name="var">IMG_PREFIX</param>
    <param name="eval">IMG_REPO=$(rpm --macros=/root/.rpmmacros -E %img_repo)</param>
    <param name="var">IMG_REPO</param>
  </service>
</services>