kiji-mapreduce: SCHEMA-684. Replace HBase's MiniZKCluster with Curator's TestingCluster

issue: https://jira.kiji.org/browse/SCHEMA-684
review: https://review.kiji.org/r/1794
commit: https://github.com/kijiproject/kiji-mapreduce/commit/be8dca9631ec8c1942b018be693ed8fc06f0e4b3