Comment 16 for bug 1614054

Tested trusty-mitaka/proposed and lgtm:

  <cputune>
    <shares>2048</shares>
    <vcpupin vcpu='0' cpuset='17'/>
    <vcpupin vcpu='1' cpuset='5'/>
    <emulatorpin cpuset='17'/>
    <vcpusched vcpus='1' scheduler='fifo' priority='1'/>
  </cputune>