Added OpenStack RDO Juno Repository, also added CentOS 7 Extras to the standard "centos7" repo.
Corrected bug in write_configs.sh
Set defaults to 'alces'
Fixed bug in cobbler install_distro.sh script
Merge branch 'ruan' of https://github.com/alces-software/symphony into ruan
Correced syntax error
Merge remote-tracking branch 'origin' into ruan