ipatests: --no-dnssec-validation requires --setup-dns
The test test_ipahealthcheck.py::TestIpaHealthCheckWithoutDNS
is installing the server without DNS but calls the installer
with --no-dnssec-validation option.
Remove the --no-dnssec-validation option as it is incompatible
with a non-DNS setup.
Fixes: https://pagure.io/freeipa/issue/9152
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>