The solution is simple... if Debian is dropping OpenVZ support... and they do have a good reason... don't use Debian as your host node distro.
OpenVZ dropped all of the non-RHEL-based branches... some time ago... and while the Debian folks have been maintaining their own OpenVZ branch... there have been bugs and feature differences to the degree that I think the recommendation has been to actually use the RHEL-based OpenVZ kernel on Debian host nodes. The problem comes in with newer Debian releases may not be compatible with the current RHEL-based branches.
For those who really want to run Debian on their OpenVZ host node, perhaps a RHEL7-based OpenVZ kernel (very speculative) from the future will work. :)