KIJIMRLIB-22. Migration KijiMR to support KijiSchema 1.3.
KIJIMR-237. Pom file does not allow to skip javadoc

 - Separate javadoc jar attachement in an execution conditions by -Dmaven.javadoc.skip

issue: https://jira.kiji.org/browse/KIJIMR-237
review: https://review.kiji.org/r/1105
Build script.