tests: Introduce negative versions of DO_TEST_CAPS_LATEST

tests: Introduce negative versions of DO_TEST_CAPS_LATEST

It's fairly easy to forget to add a capability to the list of
capabilities for a negative test case which might yield (for us) very
unfortunate results. Therefore, introduce negative versions of
DO_TEST_CAPS_LATEST macros, so that real QEMU caps can be used with
tests that expect a failure too.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>