Adding in some imports necessary for test code included in BGP router

to test routing functionality without launching Quagga. Before the next
release, both the test code and its imports will be removed.

Change-Id: I4fa8f76e977a0330572fab764e63892bb685a7a2

@@ -67,6 +67,14 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
+/* For test only - will be removed before Cardinal release
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.Ip4Prefix;
+import org.onlab.packet.MacAddress;
+import java.util.Collections;
+import static org.onlab.util.Tools.delay;
+*/
+
 /**
  * BgpRouter component.
  */