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

commit: https://github.com/kijiproject/kiji-rest/commit/f53a2066f6f8824129dd40bfbbad9fcddb0cacde
kiji-rest: [maven-release-plugin] prepare release kiji-rest-root-1.2.1

commit: https://github.com/kijiproject/kiji-rest/commit/f45ed07316628ee7db4861e0de349db66cd9f189