kiji-end-to-end-tests: SCHEMA-761. Update REVIEWERS in kiji-end-to-end-tests.

issue: https://jira.kiji.org/browse/SCHEMA-761
review: https://review.kiji.org/r/1813
commit: https://github.com/kijiproject/kiji-end-to-end-tests/commit/78d888c618af99dd5ee6ac7fa77d803a4726fce2