RATIS-55. Add missing license headers. Contributed by Tsz Wo Nicholas…

… Sze.

BUILDING.md

@@ -1,3 +1,17 @@
+<!--
+  Licensed 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. See accompanying LICENSE file.
+-->
+
 # Building
 Apache Ratis uses Apache Maven for the builds. A 3.2+ version of Maven is required as well as
 at least Java-1.8.
@@ -82,4 +96,4 @@ $ mvn -s /my/path/settings.xml deploy
 We also use release profile for building the release
 ```
 $ mvn install -Prelease -Papache-release
-```
+```

README.md

@@ -1,3 +1,17 @@
+<!--
+  Licensed 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. See accompanying LICENSE file.
+-->
+
 # Ratis
 Ratis is a java library that implements the RAFT protocol[1]. The Raft paper can be accessed at [this link] (https://raft.github.io/raft.pdf). The paper introduces Raft and states its motivations in following words:
   > Raft is a consensus algorithm for managing a replicated log. It produces a result equivalent to (multi-)Paxos, and it is as efficient as Paxos, but its structure is different from Paxos; this makes Raft more understandable than Paxos and also provides a better foundation for building practical systems.

ratis-hadoop-shaded/pom.xml

@@ -130,6 +130,13 @@
                   <directory>${shaded.sources.dir}</directory>
                   <followSymlinks>false</followSymlinks>
                 </fileset>
+                <fileset>
+                  <directory>.</directory>
+                  <includes>
+                    <include>dependency-reduced-pom.xml</include>
+                  </includes>
+                  <followSymlinks>false</followSymlinks>
+                </fileset>
               </filesets>
             </configuration>
           </plugin>

ratis-proto-shaded/pom.xml

@@ -409,6 +409,13 @@
                   <directory>${shaded.sources.dir}</directory>
                   <followSymlinks>false</followSymlinks>
                 </fileset>
+                <fileset>
+                  <directory>.</directory>
+                  <includes>
+                    <include>dependency-reduced-pom.xml</include>
+                  </includes>
+                  <followSymlinks>false</followSymlinks>
+                </fileset>
               </filesets>
             </configuration>
           </plugin>