[maven-release-plugin] prepare release v2.1.1
Revert "[maven-release-plugin] prepare release v2.1.1"

This reverts commit 003ac91ceb9cfbef434f7502c8dd091a076a1b5c.
[maven-release-plugin] prepare release v2.1.1
Changed SCM ref.
Prep for release.
[maven-release-plugin] prepare release v2.1.1