update to latest HEAD
    
    - Add yum-cron to run_with_package_names.
    - Don't create lockdir directories, as they are magic now. BZ 975864.
    -  Make 'yum install @group' give an error when trying to install a
    - non-existent group.
    - One more s/ouput/output/ fix
    - Cleanup spec for rhel-7 builds.