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

This reverts commit 546c88ebb39ae7d84bff856ddd2b754ace6cca33.
Revert "[maven-release-plugin] prepare release appverse-web-masterpom-1.4-RELEASE_6"

This reverts commit 4e6806b6293b78efd8abe61f72519adfb3450d93.