Set default on group pwpolicy with no grace limit in upgrade
    
    If an existing group policy lacks a password grace limit
    update it to -1 on upgrade.
    
    Fixes: https://pagure.io/freeipa/issue/9212
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>