Use buck version of checkstyle rules in maven build

- build and package the checkstyle rules in the onos-build-conf artifact
- modify maven build to use new version of artifact
- fix checkstyle problems in maven-only code

Change-Id: I4e4dc890ca909e47463629c732a2fc5335bb4d2a
diff --git a/apps/kafka-integration/api/src/main/java/org/onosproject/kafkaintegration/api/dto/KafkaServerConfig.java b/apps/kafka-integration/api/src/main/java/org/onosproject/kafkaintegration/api/dto/KafkaServerConfig.java
index 25beda0..c96463c 100644
--- a/apps/kafka-integration/api/src/main/java/org/onosproject/kafkaintegration/api/dto/KafkaServerConfig.java
+++ b/apps/kafka-integration/api/src/main/java/org/onosproject/kafkaintegration/api/dto/KafkaServerConfig.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright 2016-present Open Networking Laboratory
  *
  * Licensed under the Apache License, Version 2.0 (the "License");