NettyGrpcServer -- reformat code

Signed-off-by: Fedor Tokarev <ftokarev@gmail.com>

Author: ftokarev

fabric-chaincode-shim/src/main/java/org/hyperledger/fabric/shim/NettyGrpcServer.java

@@ -25,13 +25,14 @@
  */
 public final class NettyGrpcServer implements GrpcServer {
 
-    private static Log logger = LogFactory.getLog(NettyGrpcServer.class);
+    private static final Log logger = LogFactory.getLog(NettyGrpcServer.class);
 
     private final Server server;
+
     /**
      * init netty grpc server.
      *
-     * @param chaincodeBase - chaincode implementation (invoke, init)
+     * @param chaincodeBase             - chaincode implementation (invoke, init)
      * @param chaincodeServerProperties - setting for grpc server
      * @throws IOException
      */