Allows specifying the path to a yum repo configuration file to be used
during the image build process. The repo configuration file is removed
at the end of the build. This is useful in that it allows using any
arbitrary repo configuration during an image build.
Change-Id: I7d5c67d74a0bb4722ffc60aacfd9fa7e80fb59d5
The yum element provides for specific customizations
for yum based distros. The included customization is
a yum cache mounted outside of the chroot so that yum
downloaded packages are reused on subsequent image builds.
Change-Id: I6833c9fdbc83cb09debec6a789082e105c917800
