Add license information in POM files

Closes gh-1595

Author: sdeleuze

pom.xml

@@ -337,4 +337,27 @@
 		</pluginRepository>
 	</pluginRepositories>
 
+	<licenses>
+		<license>
+			<name>Apache License, Version 2.0</name>
+			<url>https://www.apache.org/licenses/LICENSE-2.0</url>
+			<comments>
+				Copyright 2008-2020 the original author or authors.
+
+				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
+
+				https://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.
+			</comments>
+		</license>
+	</licenses>
+
 </project>