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

This reverts commit 7e19d9f85abbfe59d0ef709da75ea7c00c54210c.
Revert "[maven-release-plugin] prepare release eHour-1.2"

This reverts commit a28143945b0cd7d87d6b23dd677fcfcb6e7c6412.