Add ClassPath.java license/notice to license file (#232)

Author: lresende

LICENSE

@@ -200,3 +200,10 @@
    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.
+
+===============================================================================================
+
+The kernel module includes code from Guava which is licensed under the Apache License, Version 2.0.
+- kernel/src/main/scala/org/apache/toree/utils/ClassPath.java
+
+   Copyright (C) 2012 The Guava Authors

kernel/src/main/scala/org/apache/toree/utils/ClassPath.java

@@ -1,22 +1,3 @@
-/*
- *  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
- */
-
-// Below are original header from Guava project
-
 /*
  * Copyright (C) 2012 The Guava Authors
  *