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

commit: https://github.com/kijiproject/kiji-bento/commit/f5fe6b3ce78b21c62bdf1be990fa90e121fd19ea
kiji-bento: [maven-release-plugin] prepare release kiji-bento-root-2.0.3

commit: https://github.com/kijiproject/kiji-bento/commit/50362fd41d7a83d6f269d5b2fc8f77691ea0bc41