exclude package.json from rat check

.travis.yml

@@ -106,8 +106,7 @@ after_success:
 
 after_failure:
   - echo "Travis exited with ${TRAVIS_TEST_RESULT}"
-  - cat target/rat.txt
-  - cat zeppelin-server/target/rat.txt
+  - find . -name rat.txt | xargs cat
   - cat zeppelin-distribution/target/zeppelin-*-SNAPSHOT/zeppelin-*-SNAPSHOT/logs/zeppelin*.log
   - cat zeppelin-distribution/target/zeppelin-*-SNAPSHOT/zeppelin-*-SNAPSHOT/logs/zeppelin*.out
   - cat zeppelin-web/npm-debug.log

pom.xml

@@ -933,7 +933,8 @@
               <exclude>docs/_site/**</exclude>
               <exclude>docs/Gemfile.lock</exclude>
 
-              <exclude>zeppelin-examples/zeppelin-example-horizontalbar/package.json</exclude>
+              <!-- package.json -->
+              <exclude>**/package.json</exclude>
 
               <!-- compiled R packages (binaries) -->
               <exclude>R/lib/**</exclude>

zeppelin-zengine/src/main/resources/helium/webpack.config.js

@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 module.exports = {
     entry: ['./'],
     output: {