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/registry/ZookeeperRegistry.java b/src/main/java/net/onrc/onos/core/registry/ZookeeperRegistry.java
index b103d17..4a0917e 100755
--- a/src/main/java/net/onrc/onos/core/registry/ZookeeperRegistry.java
+++ b/src/main/java/net/onrc/onos/core/registry/ZookeeperRegistry.java
@@ -56,7 +56,7 @@
  */
 public class ZookeeperRegistry implements IFloodlightModule, IControllerRegistryService {
 
-    protected final static Logger log = LoggerFactory.getLogger(ZookeeperRegistry.class);
+    private static final Logger log = LoggerFactory.getLogger(ZookeeperRegistry.class);
     protected String controllerId = null;
 
     protected IRestApiService restApi;