kiji-schema: SCHEMA-678. Update kiji script to search for appropriate HADOOP_HOME and HBASE_HOME

issue: https://jira.kiji.org/browse/SCHEMA-678
review: https://review.kiji.org/r/1737
commit: https://github.com/kijiproject/kiji-schema/commit/30b1ca0b2ab0d2ca8bf45360f6a1395f21f1c178