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

commit: https://github.com/kijiproject/kiji-framework/commit/fd39614991d566d850471c71e5bf289fd08e400f
kiji-framework: [maven-release-plugin] prepare release kiji-framework-1.2.7

commit: https://github.com/kijiproject/kiji-framework/commit/0a4cdca0d1c137d5d4c194c137d6822f89c39659