Revert "[maven-release-plugin] prepare release 4.0.9"

This reverts commit 7d2166ce1f029c4fc3518578ecace015b1f08a2c.

Conflicts:

	pom.xml
Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit 526a25a452f6b8dadcffe3554481cd46ac4670d8.

Conflicts:

	pom.xml