vconfig is actually deprecated in favor of the ip command, and is not
available on some newer distros (RHEL 7 at least). I'm not honestly sure
why it needs to be installed in all images anyway. I traced the origins
of installing the vlan package here all the way back to the first dib
git import from some other repo...so, I don't see any obvious reason why
it needs to be installed.
Change-Id: I272667cf29f5e41c217a26f70937b2842a04f748