git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@327884 13f79535-47bb-0310-9956-ffa450edef68
We must edit maven-navigation.xsd in the src/xsd directory but never maven-navigation-${currentRelease}.xsd in ${plugin.resources}/xsd.
We store maven-navigation-${currentRelease}.xsd in the SCM to be able to re-publish them if necessary.