[jdk11u-dev] RFR: 8326503: refactor junit 5 jupiter api to junit 4 api

[Anton Bobrov]

This patch addresses the test failures described in https://bugs.openjdk.org/browse/JDK-8326503 due to junit 5 package org.junit.jupiter.api which does not exist in older junit 4 that is being used here now for 11u builds by refactoring junit 5 api use to available junit 4 api.

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Commit messages:
 - 8326503: refactor junit 5 jupiter api to junit 4 api

Changes: https://git.openjdk.org/jdk11u-dev/pull/2553/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2553&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8326503
  Stats: 44 lines in 1 file changed: 0 ins; 2 del; 42 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2553.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2553/head:pull/2553

PR: https://git.openjdk.org/jdk11u-dev/pull/2553