Add a maven plugin in parent pom.xml to ensure Apache License in present in all source code files

[mariemat]

No description provided.

[mathieu-rossignol]

Copy pasting what I did in one project for that for easy bootstrap:

            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>license-maven-plugin</artifactId>
                <version>1.9</version>
                <configuration>
                    <verbose>false</verbose>
                    <addSvnKeyWords>true</addSvnKeyWords>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>update-file-header</goal>
                        </goals>
                        <phase>process-sources</phase>
                        <configuration>
                            <licenseName>apache_v2</licenseName>
                            <organizationName>Hurence</organizationName>
                            <inceptionYear>2016</inceptionYear>
                            <addSvnKeyWords>false</addSvnKeyWords>
                            <encoding>UTF-8</encoding>
                            <roots>
                                <root>src/main/java</root>
                                <root>src/test</root>
                            </roots>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

[oalam]

for now we run mvn license:format when we build releases