Comment 9 for bug 1735823

Well we know we aren't setting the force_tcg settings properly:

http://logs.openstack.org/10/524710/1/check/legacy-tempest-dsvm-neutron-full/a1867f6/logs/screen-n-cpu.txt.gz#_Dec_01_20_11_15_758749

That's sending in "force_tcg" but it turns that into a list("force_tcg") which is wrong.