kiji-mapreduce: [maven-release-plugin] prepare for next development iteration

commit: https://github.com/kijiproject/kiji-mapreduce/commit/6af7ee74d47e882609410a547cdaa17177cac25d
kiji-mapreduce: [maven-release-plugin] prepare release kiji-mapreduce-root-1.2.3

commit: https://github.com/kijiproject/kiji-mapreduce/commit/d74cccedd69e399c10e23458ec7549b7dd435e0c