Update CHANGES, RELEASENOTES, and jdiff for 3.0.2 release.

(cherry picked from commit f6ecb76d0b919b9836600fe28ec9e637b223cd54)

Conflicts:
	hadoop-project-dist/pom.xml

hadoop-common-project/hadoop-common/src/site/markdown/release/3.0.2/CHANGES.3.0.2.md

@@ -0,0 +1,31 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop Changelog
+
+## Release 3.0.2 - 2018-04-13
+
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-15368](https://issues.apache.org/jira/browse/HADOOP-15368) | Apache Hadoop release 3.0.2 to fix deploying shaded jars in artifacts. |  Major | . | Lei (Eddy) Xu | Lei (Eddy) Xu |
+
+

hadoop-common-project/hadoop-common/src/site/markdown/release/3.0.2/RELEASENOTES.3.0.2.md

@@ -0,0 +1,31 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop  3.0.2 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
+
+
+---
+
+* [HADOOP-15368](https://issues.apache.org/jira/browse/HADOOP-15368) | *Major* | **Apache Hadoop release 3.0.2 to fix deploying shaded jars in artifacts.**
+
+Release Apache Hadoop 3.0.2 on the same code base as Hadoop 3.0.1, but deploy with shaded jars.
+
+
+

hadoop-project-dist/pom.xml

@@ -145,7 +145,7 @@
         <activeByDefault>false</activeByDefault>
       </activation>
       <properties>
-        <jdiff.stable.api>3.0.1</jdiff.stable.api>
+        <jdiff.stable.api>3.0.2</jdiff.stable.api>
         <jdiff.stability>-unstable</jdiff.stability>
         <!-- Commented out for HADOOP-11776 -->
         <!-- Uncomment param name="${jdiff.compatibility}" in javadoc doclet if compatibility is not empty -->