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

This reverts commit b4c466dae1e51218b03ebb11e65c8854e5ec69eb.
Revert "[maven-release-plugin] prepare release jasper-jsp-8.0.9.M0"

This reverts commit 5f85735272c7312b105d7061afcb9d10fedafc7f.