Describe strasbourg network

Related to bug 13715.

This merge request describe more accurately Strasbourg's network.

Because the rate of fleckenstein's eth1 interface is not detected by g5k-checks, eth1 is currently not enabled on the cluster.

data/grid5000/sites/strasbourg/clusters/fleckenstein/nodes/fleckenstein-1.json

@@ -155,19 +155,24 @@
     {
       "device": "eth2",
       "driver": "ice",
-      "enabled": false,
+      "enabled": true,
       "firmware_version": "3.20 0x80012765 1.3189.0",
       "interface": "Ethernet",
+      "ip": "172.16.160.21",
+      "ip6": "2001:660:4406:a00:1:1:0:1",
       "kavlan": false,
       "mac": "6c:fe:54:47:1a:84",
       "management": false,
       "model": "Ethernet Controller E810-C for SFP",
-      "mountable": false,
+      "mountable": true,
       "mounted": false,
       "name": "ens1f0",
+      "network_address": "fleckenstein-1-eth2.strasbourg.grid5000.fr",
       "rate": 25000000000,
       "sriov": true,
       "sriov_totalvfs": 64,
+      "switch": "gw-strasbourg",
+      "switch_port": "Ethernet8",
       "vendor": "Intel"
     },
     {