nss: Add original DN and memberOf to origbyname request
IPA HBAC evaluation relies on the original values for DN and memberOf
attributes.
Resolves https://fedorahosted.org/sssd/ticket/2560
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
(cherry picked from commit 7543052f562f157f7b17fdc46a6777d80c0cb3bd)