Remove named-pkcs11 workarounds from DNSSEC tests.
    
    As far as I can tell the tests are passing for some time in Jenkins so
    maybe a bug in some underlying component was fixed. Let's remove
    workarounds to make tests actually test real setups.
    
    https://fedorahosted.org/freeipa/ticket/5348
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>