bento-cluster: [maven-release-plugin] prepare for next development iteration

commit: https://github.com/kijiproject/bento-cluster/commit/15238725a4e7b7b02b20a8a9e9a5adf669fadb39
bento-cluster: [maven-release-plugin] prepare release bento-cluster-1.2.2

commit: https://github.com/kijiproject/bento-cluster/commit/e4b8af1b1c2f403aa3b03592a6c2fceab3e31685