[CentOS-virt] Updated centos-release-xen packages (fixes missing initrd issue on upgrade)

Wed Jan 20 18:33:03 UTC 2016
George Dunlap <dunlapg at umich.edu>

I've pushed an update to the centos-release-xen package,
centos-release-xen-7-12.el6, to centos-virt-xen-testing, which should
fix the "missing initrd" issue people have been seeing.

Please test and see if it fixes your issue (and that it makes no other
issues).  If everything works well, I'll get it pushed to