Test: Generate cluster.json for ONOS single node cluster while starting ONOS.
A default cluster.json is loaded for 172.17.0.2 (common case for cord-tester)
Otherwise its regenerated on the fly during ONOS cord-tester boot.
It also eliminates the onos.cluster.metadata.uri warning in the logs because of missing cluster.json.

Change-Id: I6e6ec85254f135d90a86cb540b68c0bdfd030b3b
diff --git a/src/test/setup/onos-config/cluster.json b/src/test/setup/onos-config/cluster.json
new file mode 100644
index 0000000..72ae4c0
--- /dev/null
+++ b/src/test/setup/onos-config/cluster.json
@@ -0,0 +1,18 @@
+{
+    "nodes": [
+        {
+            "ip": "172.17.0.2",
+            "id": "172.17.0.2",
+            "port": 9876
+        }
+    ],
+    "name": 4220150786,
+    "partitions": [
+        {
+            "id": 1,
+            "members": [
+                "172.17.0.2"
+            ]
+        }
+    ]
+}