Comment 21 for bug 1570195

Xenial is released, so we are back in SRU mode.
Therefore I add the matching SRU Template for the upload of 2.2.0ubuntu8 which is in the unapproved queue atm.

[Impact]

 * using devices by DPDK and the kernel at once drives the system into hangs
 * the fix avoids using devices in DPDK that are still in use by the kernel
 * fix is a backport form upstream accepted patch

[Test Case]

 * run dpdk in a guest on virtio-pci devices
 * afterwards do anything that touches the queues of the device like ethtool -L

[Regression Potential]

 * Some existing setups might no more work if they set up DPDK on kernel owned devices. But that is intentional as they are only one step away from breaking their systems
 * The documentation in the server guide has been adapted to reflect the new needs (merge proposal waits for ack)
 * also the comments and examples in the config files have been adapted to reflect the new style
  * passed ADT tests on i368/amd64/amd64-lowmem and our full CI (https://code.launchpad.net/~ubuntu-server/ubuntu/+source/dpdk-testing/+git/dpdk-testing)