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

This reverts commit a118ea5c59d653f5a3feda21455ba60bc722b3b1.
Revert "[maven-release-plugin] prepare release v1.1.0-rc1"

This reverts commit 79e86ef3e1a3ee03a7e3b166a5c7dee11c6d60d7.
Additional CHANGES.txt