api: Add missing license header to BaseViewVO

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>

api/src/org/apache/cloudstack/api/view/vo/BaseViewVO.java

@@ -1,12 +1,23 @@
+// 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.
 package org.apache.cloudstack.api.view.vo;
 
 import javax.persistence.Column;
 
-/**
- * Base class for all VO objects for db views.
- * @author minc
- *
- */
 public abstract class BaseViewVO {
 
     @Column(name="id", updatable=false, nullable = false)