[ONOS-4171] Proper Router ID format.

Change-Id: I97c714792e56cc92d761d1d7e85baa1ca8e78893
diff --git a/protocols/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpDpid.java b/protocols/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpDpid.java
index 8baa5f0..a0f5952 100644
--- a/protocols/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpDpid.java
+++ b/protocols/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpDpid.java
@@ -70,7 +70,7 @@
     /*
      * Get iso node ID in specified string format.
      */
-    private String isoNodeIdString(byte[] isoNodeId) {
+    public String isoNodeIdString(byte[] isoNodeId) {
         if (isoNodeId != null) {
             return String.format("%02x%02x.%02x%02x.%02x%02x", isoNodeId[0], isoNodeId[1],
                                  isoNodeId[2], isoNodeId[3],