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

commit: https://github.com/kijiproject/kiji-schema/commit/b2272978ac17e9e94e524bc02624c3e3c1a0412c
kiji-schema: [maven-release-plugin] prepare release kiji-schema-root-1.4.2

commit: https://github.com/kijiproject/kiji-schema/commit/974e564b99ccb3451f9681511d05e2ff08ab399b