tests: use --setup-kra in tests
This will allow to test --setup-kra option together with
ipa-server-install in install tests
Separate installation using ipa-kra-install is already covered.
https://pagure.io/freeipa/issue/6731
Reviewed-By: Jan Cholasta <jcholast@redhat.com>
Reviewed-By: Tomas Krizek <tkrizek@redhat.com>