kiji-rest: REST-107. KijiREST needs to properly parse ints as longs in entity id components

issue: https://jira.kiji.org/browse/REST-107
review: https://review.kiji.org/r/1662
commit: https://github.com/kijiproject/kiji-rest/commit/e2fddd03fd68757e64f8040dfb17605624771560