Enable checkstyle rule for JLS modifier order

JLS specifies a preferred order for modifiers in
declarations.  Enabled this rule and fixed the
problems that it encountered.

Change-Id: I5e8fa3d29f785ced4c61fbb8c7c8b168289f06e2
diff --git a/src/main/java/net/onrc/onos/core/flowprogrammer/FlowPusher.java b/src/main/java/net/onrc/onos/core/flowprogrammer/FlowPusher.java
index 5477dd3..a5fa1aa 100644
--- a/src/main/java/net/onrc/onos/core/flowprogrammer/FlowPusher.java
+++ b/src/main/java/net/onrc/onos/core/flowprogrammer/FlowPusher.java
@@ -83,7 +83,7 @@
  * @author Naoki Shiota
  */
 public class FlowPusher implements IFlowPusherService, IOFMessageListener {
-    private final static Logger log = LoggerFactory.getLogger(FlowPusher.class);
+    private static final Logger log = LoggerFactory.getLogger(FlowPusher.class);
     protected static final int DEFAULT_NUMBER_THREAD = 1;
 
     // TODO: Values copied from elsewhere (class LearningSwitch).