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/linkdiscovery/internal/LinkDiscoveryManager.java b/src/main/java/net/onrc/onos/core/linkdiscovery/internal/LinkDiscoveryManager.java
index efa0188..7b0892d 100644
--- a/src/main/java/net/onrc/onos/core/linkdiscovery/internal/LinkDiscoveryManager.java
+++ b/src/main/java/net/onrc/onos/core/linkdiscovery/internal/LinkDiscoveryManager.java
@@ -115,7 +115,7 @@
         implements IOFMessageListener, IOFSwitchListener,
         ILinkDiscoveryService, IFloodlightModule {
     protected IFloodlightProviderService controller;
-    protected final static Logger log = LoggerFactory.getLogger(LinkDiscoveryManager.class);
+    private static final Logger log = LoggerFactory.getLogger(LinkDiscoveryManager.class);
 
     protected IFloodlightProviderService floodlightProvider;
     protected IThreadPoolService threadPool;