BZ #1129521: Unconfigured interfaces should be ONBOOT=no

https://bugzilla.redhat.com/show_bug.cgi?id=1129521

Set unconfigured interfaces to ONBOOT=no and BOOTPROTO=none
Merge pull request #109 from bcrochet/bz/1129521

BZ #1129521: Unconfigured interfaces should be ONBOOT=no