Added needed attributes to case statement for centos
Changed varnish default from /etc/default/varnish to /etc/sysconfig/default for CentOS
Merge remote-tracking branch 'ianrossi/centos_support'

* ianrossi/centos_support:
  Changed varnish default from /etc/default/varnish to /etc/sysconfig/default for CentOS
  Added needed attributes to case statement for centos