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

This reverts commit 111d6d14d91c2046a745f305521252f40146a609.
Revert "[maven-release-plugin] prepare release SlipStream-2.0.17"

This reverts commit 7c1195d48e7eedef9ec0c4420ff3eea469a6528b.
Removed snapshot in preparation for release