Revert "Bump junit from 4.12 to 4.13.1 (#1556)" (#1568)
Revert "Bump junit from 4.12 to 4.13.1 (#1556)" (#1568)

This reverts commit 8fdd64868b0dea21d9d4770968412d49b8fea33b.
elasticjob/elastic-job,elasticjob/elastic-job,elasticjob/elastic-job,elasticjob/elastic-job