Fixes #180: updated spec to take into account namespace in the xml response.
Fixes #180: updated spec to take into account namespace in the xml response.

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