GUI -- Added routerId to AnnotationKeys; added test scenario for multi-homed hosts (routers).

Change-Id: Ief5f23fa1678152d5375a2b54fe5735c9632d588
diff --git a/web/gui/src/test/_karma/ev/multiHomed/ev_1_addInstanceA.json b/web/gui/src/test/_karma/ev/multiHomed/ev_1_addInstanceA.json
new file mode 100644
index 0000000..ea1fa0f
--- /dev/null
+++ b/web/gui/src/test/_karma/ev/multiHomed/ev_1_addInstanceA.json
@@ -0,0 +1,14 @@
+{
+  "event": "addInstance",
+  "payload": {
+    "id": "myInstA",
+    "ip": "192.168.56.101",
+    "online": true,
+    "uiAttached": true,
+    "switches": 2,
+    "labels": [
+      "myInstA",
+      "192.168.56.101"
+    ]
+  }
+}