kiji-end-to-end-tests: EXP-430. Update tutorial end-to-end tests to test python script.

issue: https://jira.kiji.org/browse/EXP-430
review: https://review.kiji.org/r/1773/
commit: https://github.com/kijiproject/kiji-end-to-end-tests/commit/1f970efecee569eeeae742af89e7cd06fc7c8f65