l10n Maven plugin can break deployment metadata

Our l10n Maven does have a dependency on maven. This was 3.2.1 and got updated last year to 3.5.0 [1].

Maven 3.5.0 had a regression [2] that can cause the metadata to be incorrect on deployment, potentially causing builds to break on resolvable dependencies.

Version either to be reset to the 3.2.x version (which we currently support) or the latest 3.5.x that resolved the issue. To be researched what versions are compatible with the Maven version we officially support. For version 13 we have the option to require Maven 3.5 as minimum Maven version.
 
 
[1] <maven.version>3.5.0</maven.version>
https://code.onehippo.org/cms-community-dev/hippo-cms-l10n-tooling/blob/release/2.5/maven-plugin/pom.xml
 
[2] https://issues.apache.org/jira/browse/MNG-6240