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

commit: https://github.com/kijiproject/kiji-mapreduce/commit/982ab98d409916358cd2a87ae0518e2f43a7fd68
kiji-mapreduce: [maven-release-plugin] prepare release kiji-mapreduce-root-1.2.2

commit: https://github.com/kijiproject/kiji-mapreduce/commit/4a441f7336a77ffcfc9fb1b6c6142bcae329009c