[11u] RFR: 8222299: [TESTBUG] move hotspot container tests to hotspot/containers

[Severin Gehwolf]

Hi,

Note: Christoph Langer asked me to take this over for him. He's
currently on vacation.

This is another patch for Oracle JDK 11 feature parity. The JDK 13
patch does not apply cleanly because:

- JDK 11u doesn't have JFR docker tests (JDK-8219997)
- doc changes aren't present in JDK 11u (JDK-8221894)

That's why I've recreated the patch manually by omitting doc/testing*
changes (haven't looked at backporting JDK-8219997), and doing a "hg mv
test/hotspot/jtreg/runtime/containers test/hotspot/jtreg/containers".
The rest of the patch is unchanged.

Testing: Docker tests on Linux x86_64 (manual and using 
         :hotspot_containers group)

webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8222299/jdk11/02/webrev/
Bug: https://bugs.openjdk.java.net/browse/JDK-8222299
original changeset: http://hg.openjdk.java.net/jdk/jdk/rev/5ae4d3f46537

Previous RFRs: https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2019-August/001573.html

Thoughts?

Thanks,
Severin