Feature/nat 329 validate interface names for migrate

data/routers.json

 [
   {
-    "customer": "GÉANT",
     "router_site": "AMS",
     "hostname": "rt1",
     "ts_port": 22111,
@@ -9,12 +8,11 @@
     "router_lo_ipv4_address": "62.40.119.2",
     "router_lo_ipv6_address": "2001:798:1ab::2",
     "router_lo_iso_address": "49.51e5.0001.0620.4011.9002.00",
-    "is_ias_connected": false
+    "is_ias_connected": true
   },
   {
-    "customer": "GÉANT",
-    "router_site": "AMS2",
-    "hostname": "rt2",
+    "router_site": "ATH",
+    "hostname": "rt1",
     "ts_port": 22111,
     "router_vendor": "juniper",
     "router_role": "p",
@@ -22,5 +20,38 @@
     "router_lo_ipv6_address": "2001:798:1ab::1",
     "router_lo_iso_address": "49.51e5.0001.0620.4011.9001.00",
     "is_ias_connected": false
+  },
+  {
+    "router_site": "BIL",
+    "hostname": "rt1",
+    "ts_port": 22111,
+    "router_vendor": "juniper",
+    "router_role": "p",
+    "router_lo_ipv4_address": "62.40.119.3",
+    "router_lo_ipv6_address": "2001:798:1ab::3",
+    "router_lo_iso_address": "49.51e5.0001.0620.4011.9003.00",
+    "is_ias_connected": false
+  },
+  {
+    "router_site": "DUB",
+    "hostname": "rt1",
+    "ts_port": 22111,
+    "router_vendor": "juniper",
+    "router_role": "p",
+    "router_lo_ipv4_address": "62.40.119.4",
+    "router_lo_ipv6_address": "2001:798:1ab::4",
+    "router_lo_iso_address": "49.51e5.0001.0620.4011.9004.00",
+    "is_ias_connected": false
+  },
+    {
+    "router_site": "LON",
+    "hostname": "rt1",
+    "ts_port": 22111,
+    "router_vendor": "juniper",
+    "router_role": "p",
+    "router_lo_ipv4_address": "62.40.119.5",
+    "router_lo_ipv6_address": "2001:798:1ab::5",
+    "router_lo_iso_address": "49.51e5.0001.0620.4011.9005.00",
+    "is_ias_connected": true
   }
 ]