[maven-release-plugin] prepare release oparo-0.5
Revert "[maven-release-plugin] prepare release oparo-0.5"

This reverts commit 550402bc4a8f99d116c01c5825b5297571e797d5.
Revert "neuer versuch"

This reverts commit 5d2ce82db73e6be0eecb96968d8d69752a59231d.