chroot: rcn-ee.conf: deb_distribution is not used by anything

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
chroot: factor out rcn-ee.conf

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
chroot: use distro over deb_distribution

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
chroot: factor out repo_rcnee

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>