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

This reverts commit 4f8f86c2c66dc2f6a17d5b0e4fdeeb06a71ba52f.
Revert "[maven-release-plugin] prepare release v0.9.0-incubating"

This reverts commit 77c32470a1b02d6f1475bda2cfb9ae5bd4b53dde.
Updating CHANGES.txt file
[maven-release-plugin] prepare release v0.9.0-incubating
[maven-release-plugin] prepare for next development iteration