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

commit: https://github.com/kijiproject/kiji-schema/commit/5bfdb8a4ec3002538aebb466373a0c10f995a0d8
kiji-schema: [maven-release-plugin] prepare release kiji-schema-root-1.3.4

commit: https://github.com/kijiproject/kiji-schema/commit/693a5ea984ece15609f84a611d9cf39f0338a101