BVS-570 handle PortStatus messages in every state during switch handshake.

or explicitly ingore it if it's safe

src/main/java/net/floodlightcontroller/core/internal/OFChannelHandler.java

@@ -430,6 +430,12 @@ class OFChannelHandler
                 // need to implement since its abstract but it will never
                 // be called
             }
+
+            @Override
+            void processOFPortStatus(OFChannelHandler h, OFPortStatus m)
+                    throws IOException {
+                unhandledMessageReceived(h, m);
+            }
         },
 
         /**
@@ -460,6 +466,12 @@ class OFChannelHandler
             void processOFError(OFChannelHandler h, OFError m) {
                 logErrorDisconnect(h, m);
             }
+
+            @Override
+            void processOFPortStatus(OFChannelHandler h, OFPortStatus m)
+                    throws IOException {
+                unhandledMessageReceived(h, m);
+            }
         },
 
         /**
@@ -497,6 +509,12 @@ class OFChannelHandler
             void processOFError(OFChannelHandler h, OFError m) {
                 logErrorDisconnect(h, m);
             }
+
+            @Override
+            void processOFPortStatus(OFChannelHandler h, OFPortStatus m)
+                    throws IOException {
+                unhandledMessageReceived(h, m);
+            }
         },
 
         WAIT_SET_L2_TABLE_REPLY(false) {
@@ -688,6 +706,12 @@ class OFChannelHandler
                 // TODO: we could re-set the features reply
                 illegalMessageReceived(h, m);
             }
+
+            @Override
+            void processOFPortStatus(OFChannelHandler h, OFPortStatus m)
+                    throws IOException {
+                h.pendingPortStatusMsg.add(m);
+            }
         },
 
         /**
@@ -734,6 +758,7 @@ class OFChannelHandler
             void processOFPortStatus(OFChannelHandler h, OFPortStatus m)
                     throws IOException {
                 handlePortStatusMessage(h, m, false);
+
             }
         },
 
@@ -1219,10 +1244,9 @@ class OFChannelHandler
             unhandledMessageReceived(h, m);
         }
 
-        void processOFPortStatus(OFChannelHandler h, OFPortStatus m)
-                throws IOException {
-            unhandledMessageReceived(h, m);
-        }
+        // bi default implementation. Every state needs to handle it.
+        abstract void processOFPortStatus(OFChannelHandler h, OFPortStatus m)
+                throws IOException;
 
         void processOFQueueGetConfigReply(OFChannelHandler h,
                                           OFQueueGetConfigReply m)