pkcs11: disable testing on el7, don't limit them on Fedora

On el7, connection fail because wpa_supplicant or openssl can't load shared library despite it being registered in p11-kit, see [1] for details. Unless this bug gets fixed, let's disable these test on el7. https://bugzilla.redhat.com/show_bug.cgi?id=2005936

OTOH, this should work on Fedora with wifi as well as on ethernet so let's remove the same checks over there.