Add a method to parse a binary string to a Prefix.

This enables us to get human-readable output out of the radix tress.

Addresses ONOS-1957.

Change-Id: Ia28f6e56e7067bfe447423ba8451d762c4baa49c
diff --git a/src/main/java/net/onrc/onos/apps/sdnip/web/IncomingRequestResource.java b/src/main/java/net/onrc/onos/apps/sdnip/web/IncomingRequestResource.java
index 5a35bb4..7f175f0 100644
--- a/src/main/java/net/onrc/onos/apps/sdnip/web/IncomingRequestResource.java
+++ b/src/main/java/net/onrc/onos/apps/sdnip/web/IncomingRequestResource.java
@@ -54,7 +54,7 @@
                 }
 
                 output.append("    {\"prefix\": \"");
-                output.append(entry.getKey());
+                output.append(Prefix.fromBinaryString(entry.getKey().toString()));
                 output.append("\", \"nexthop\": \"");
                 output.append(entry.getValue().getNextHop().getHostAddress());
                 output.append("\"}");