sanitytest: turn into a normal python unittest
sanitytest: turn into a normal python unittest

The sanitytest.py file is now using the normal python unittest
pattern, though we invoke the one test explicitly for now.

Signed-off-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

libvirt/libvirt-python,libvirt/libvirt-python,libvirt/libvirt-python