configure mobile-gateway system command hierarchy

    configure
      — mobile-gateway
          — system
              — bng
                  — queries
                      — session
                          — acct-multi-session-id
                          — acct-session-id
                          — apn
                          — c-vlan
                          — circuit-id
                          — client-user-name
                          — client-user-name-domain
                          — description
                          — fate-sharing-group-id
                          — imei
                          — imsi
                          — ip
                              — address-stacks
                                  — ipv4
                                  — ipv6-na
                                  — ipv6-pd
                                  — ipv6-slaac
                              — prefix
                          — l2-access-id
                          — mac-address
                          — msisdn
                          — nat-profile
                          — network-realm
                          — output-options
                              — charging
                              — count
                              — nat
                          — pfcp
                              — local-seid
                              — remote-seid
                          — remote-id
                          — s-vlan
                          — subscriber-name
                          — up-ip
                          — user-access-type
                          — wpp-portal-group
                      — subscriber
                          — acct-session-id
                          — apn
                          — description
                          — fate-sharing-group-id
                          — l2-access-id
                          — network-realm
                          — output-options
                              — charging
                              — count
                              — nat
                          — subscriber-id
                          — subscriber-name
                          — up-ip
              — call-insight
                  — location
                      — disable
                      — limit
                      — primary
                  — max-files-number
              — group
                  — protect-active-delay
                  — shutdown
              — resource-pool
                  — card
                  — protect-active-delay  
              — thresholds
                  — system-mg-ism
                      — interval
                      — shutdown