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

commit: https://github.com/kijiproject/kiji-model-repository/commit/a3782eb7f9ee6a46f282e617a48d0adbd54fd58d
kiji-model-repository: [maven-release-plugin] prepare release kiji-model-repository-root-0.4.0

commit: https://github.com/kijiproject/kiji-model-repository/commit/bfe771d1998ffdf4c3e91275c4d35b336d0ca1a7