Docker defaults DNS to 8.8.8.8 if resolv.conf uses 127.0.0.1
Merge pull request #109 from derekwaynecarr/fix_resolv_conf_ordering

Docker defaults DNS to 8.8.8.8 if resolv.conf uses 127.0.0.1
unable to resolve mirrorlist.centos.org on aws env
Merge pull request #110 from derekwaynecarr/fix_resolv_conf_ordering

unable to resolve mirrorlist.centos.org on aws env
Remove unneccessary content from Vagrantfile to correct test builds