[jdk8u-dev] RFR: 8222299: [TESTBUG] move hotspot container tests to hotspot/containers [v3]

[yaqsun]

> This is a backport of JDK-8222299: [TESTBUG] move hotspot container tests to hotspot/container.
> 
> This patch has already been applied to OracleJDK8.
> 
> This backport has resolved the conflict about hotspot/test/TEST.groups. doc/testing.html and doc/testing.md do not exist in 8u.

yaqsun has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'openjdk:master' into backport-8222299
 - Backport 66c817134fa012d53128eecfc1bac0c32c678145
 - Backport 66c817134fa012d53128eecfc1bac0c32c678145

-------------

Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/488/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/488/files/6812ef76..891c045e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=488&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=488&range=01-02

  Stats: 3523 lines in 53 files changed: 3140 ins; 142 del; 241 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/488.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/488/head:pull/488

PR: https://git.openjdk.org/jdk8u-dev/pull/488