Feature/nat 354 import lab data to core db

data/routers.json

+[
+  {
+    "customer": "GÉANT",
+    "router_site": "AMS",
+    "hostname": "rt1",
+    "ts_port": 22111,
+    "router_vendor": "juniper",
+    "router_role": "p",
+    "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
+  },
+  {
+    "customer": "GÉANT",
+    "router_site": "AMS2",
+    "hostname": "rt2",
+    "ts_port": 22111,
+    "router_vendor": "juniper",
+    "router_role": "p",
+    "router_lo_ipv4_address": "62.40.119.1",
+    "router_lo_ipv6_address": "2001:798:1ab::1",
+    "router_lo_iso_address": "49.51e5.0001.0620.4011.9001.00",
+    "is_ias_connected": false
+  }
+]