qemu.tests.enforce_quit: Update some config for different qemu-kvm version

since enforce output are different in different qemu-kvm version, so update
these config.

Signed-off-by: Shuping Cui <scui@redhat.com>
Merge pull request #7 from spcui/enforce_quit_fix

qemu.tests.enforce_quit: Update some config for different qemu-kvm version