[Dev] Jtreg is launching!

jtreg is the test harness used by the JDK test framework. This framework is intended primarily for regression tests. It can also be used for unit tests, functional tests, and even simple product tests. It is the latest version without CVE.

We have set up a repo request[1] in openEuler.

[1] https://gitee.com/openeuler/community/pulls/991