kiji-express: EXP-390. support for running Express on secure HBase

issue: https://jira.kiji.org/browse/EXP-390
review: https://review.kiji.org/r/1533
commit: https://github.com/kijiproject/kiji-express/commit/ff9f2a6a5a47ce2bcc4417e4050e01aa4b87ffe2