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

This reverts commit 3b6c25a6c7c3228848f9ec233aa383d61ce4d17a.
Revert "Added generated changelog mapping"

This reverts commit ed853c5071d24da56bca31daca5f00340106077e.
Revert "[maven-release-plugin] prepare release contentconnector-1.16.0"

This reverts commit fa07a247623468a5bbe157675dc253274870d5b5.