TESTS: moved cwrap/test_negcache to cmocka tests
Moved cwrap/test_negcache.c to cmocka tests since it doesn't use
cwrap tools anymore.
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
(cherry picked from commit 137b684d0a01afa02618b07ba46a44dad017b5b9)
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>