Fix load_server parameter for cas spec.
Fix load_server parameter for cas spec.

identification-io/rubycas-server,adamdruppe/rubycas-server,geo767/rubycas-server,adamdruppe/rubycas-server,identification-io/rubycas-server,geo767/rubycas-server,jay3126/ruby_cas_server,adamdruppe/rubycas-server,infoman/rubycas-server,infoman/rubycas-server,rubycas/rubycas-server,rubycas/rubycas-server,rubycas/rubycas-server,infoman/rubycas-server,identification-io/rubycas-server,jay3126/ruby_cas_server,geo767/rubycas-server