EXP-467. Jobs launched with express.py on CDH 5 die with "Caused by: java.lang.ClassNotFoundException: Class cascading.tap.hadoop.io.MultiInputSplit not found" in child processes

Expand the scope of JARs included on the distributed cache.

issue: https://jira.kiji.org/browse/EXP-467
review: https://review.kiji.org/r/2048