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

commit: https://github.com/kijiproject/kiji-modeling/commit/8d346c93664a91d183632a7972a7b454357fda02
kiji-modeling: [maven-release-plugin] prepare release kiji-modeling-root-0.6.0

commit: https://github.com/kijiproject/kiji-modeling/commit/b232a3d67208ec8b9c0f926b05bff69d9afaf41c