IDMAP: New structure for domain range params
    
    Create new internal structure idmap_range_params by merging ID mapping
    range relevant fields from idmap_domain_info and remove corrsponding
    fields.
    
    Resolves:
    https://fedorahosted.org/sssd/ticket/2188
    
    Reviewed-by: Sumit Bose <sbose@redhat.com>
    (cherry picked from commit c3cdd6a644a870531092e4378cbcd1a428ff514c)