Revert "[maven-release-plugin] rollback the release of ete-parent-3.1.1"

This reverts commit b6882a45eaa5a437d869151828dc0c57f717f6d8.
Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit 3250d732fe3bf09518f4d1205499759e091c4e5c.
Revert "[maven-release-plugin] prepare release ete-parent-3.1.1"

This reverts commit 0af1feb09ab507e7a7cc81f7f3c1c924e1c3caa6.
Remove PMD Eclipse plugin
Remove distribution management as it hinders the release.