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

commit: https://github.com/kijiproject/bento-cluster/commit/c51a716ce179a5c21a89038111aabb57cc37fe94
bento-cluster: [maven-release-plugin] prepare release bento-cluster-1.2.3

commit: https://github.com/kijiproject/bento-cluster/commit/9cb014d1681815e55e21eb857efe95bfa07c2cde