Comment 55 for bug 1679823

We really need to get xenial added for its HWE kernels:
we have several BootStacks running with them, mainly for
latest needed drivers while keeping LTS (mellanox for
VNFs as an example)- all these are now obviously at
risk on the next reboot.

Note also that recovering from this issue does usually
require OOB access to the node, as typically bonded
interfaces are used for both mgmt and data planes.