kiji-mapreduce: KIJIMR-297. ConsistentHostOrderPolicy needs to support updated Host.StateListener interface for version 2.0.4 of DataStax Java driver

issue: https://jira.kiji.org/browse/KIJIMR-297
review: https://review.kiji.org/r/2082
commit: https://github.com/kijiproject/kiji-mapreduce/commit/ce34f6314ff54216bc0ab2e5e307f6b0783b437e