Organized imports for main classes

Change-Id: I3b05d7f289706aef04019a820be9989f8fb54945
diff --git a/src/main/java/net/floodlightcontroller/core/internal/OFMessageFuture.java b/src/main/java/net/floodlightcontroller/core/internal/OFMessageFuture.java
index f01e179..60b932f 100644
--- a/src/main/java/net/floodlightcontroller/core/internal/OFMessageFuture.java
+++ b/src/main/java/net/floodlightcontroller/core/internal/OFMessageFuture.java
@@ -23,12 +23,12 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 
-import org.openflow.protocol.OFMessage;
-import org.openflow.protocol.OFType;
-
 import net.floodlightcontroller.core.IOFSwitch;
 import net.floodlightcontroller.threadpool.IThreadPoolService;
 
+import org.openflow.protocol.OFMessage;
+import org.openflow.protocol.OFType;
+
 /**
  * A Future object used to retrieve asynchronous OFMessage replies. Unregisters
  * and cancels itself by default after 60 seconds. This class is meant to be