Update mod_nss cipher list so there is overlap with a 4.x master
    
    dogtag updated its cipher list, disabling a lot of ciphers, which
    causes an overlap problem with a RHEL 6.x IPA master.
    
    This update script adds the two available ciphers to the nss.conf
    so that creating a CA replica is possible.
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>