[sophia][network] add sw-5 and update config for gw-sophia sw-{2,3,6}...

[sophia][network] add sw-5 and update config for gw-sophia sw-{2,3,6} swadmin-{2,3} to change uplink topology

data/grid5000/sites/sophia/network_equipments/gw.json

@@ -231,6 +231,10 @@
           "uid": "LABO"
         },
         {
+          "kind": "switch",
+          "rate": 10000000000,
+          "snmp_name": "1/1/44",
+          "uid": "sw-5"
         },
         {
           "kind": "switch",