Remove PortEvent.SwitchPort

- JSON format of util.SwitchPort has changed to match PortEvent.SwitchPort.
  (not sure if it was currently used in public API)
- Note: SwitchPort#toString() format is different. Log messages, etc. may have changed.
   PortEvent.SwitchPort : "(dpid@number)" both decimal
   util.SwitchPort : "00:00:...:01/number" dpid as HexString, number as decimal

- Part of ONOS-1564

Change-Id: I19ea06de7a701f0f7aaae0a7ed6f0726c0133a91
diff --git a/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java b/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
index 0a2ed39..fc30f12 100644
--- a/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
+++ b/src/main/java/net/onrc/onos/apps/forwarding/Forwarding.java
@@ -37,7 +37,6 @@
 import net.onrc.onos.core.topology.Port;
 import net.onrc.onos.core.topology.Switch;
 import net.onrc.onos.core.topology.Topology;
-import net.onrc.onos.core.util.Dpid;
 import net.onrc.onos.core.util.FlowPath;
 import net.onrc.onos.core.util.PortNumber;
 import net.onrc.onos.core.util.SwitchPort;
@@ -420,7 +419,7 @@
                     for (Iterator<LinkEvent> i = path.iterator(); i.hasNext();) {
                         LinkEvent le = i.next();
 
-                        if (new Dpid(le.getSrc().dpid).equals(sw.getDpid())) {
+                        if (le.getSrc().getDpid().equals(sw.getDpid())) {
                             log.trace("The packet-in sw dpid {} is on the path.", sw.getDpid());
                             isflowEntryForThisSwitch = true;
                             outPort = le.getSrc().getNumber().value();