kiji-mapreduce: POM-32. Add references to Curator in root-pom.

issue: https://jira.kiji.org/browse/POM-32
review: https://review.kiji.org/r/1799
commit: https://github.com/kijiproject/kiji-mapreduce/commit/033aa0cbc992b280894a6b02917d5bb406215f5e
kiji-mapreduce-lib: POM-32. Add references to Curator in root-pom.

issue: https://jira.kiji.org/browse/POM-32
review: https://review.kiji.org/r/1800
commit: https://github.com/kijiproject/kiji-mapreduce-lib/commit/bccc976c48c98a49a57ac71ed1ee77d889fd0685