RFR: 8271302: Regex Test Refresh

8271302: Regex Test Refresh ------------- Commit messages: - Migrating regular expression tests to TestNG Changes: https://git.openjdk.java.net/jdk/pull/5092/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5092&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8271302 Stats: 2226 lines in 3 files changed: 225 ins; 965 del; 1036 mod Patch: https://git.openjdk.java.net/jdk/pull/5092.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5092/head:pull/5092 PR: https://git.openjdk.java.net/jdk/pull/5092