RFR: 8282170: JVMTI SetBreakpoint metaspace allocation test [v4]

[Aleksey Shipilev]

> There are few bugs in SetBreakpoint when it reaches for metaspace allocation, notably [JDK-8214992](https://bugs.openjdk.java.net/browse/JDK-8214992) and [JDK-8264149](https://bugs.openjdk.java.net/browse/JDK-8264149). This adds the test that exercises the metaspace allocation paths.
> 
> Requires [JDK-8282172](https://bugs.openjdk.java.net/browse/JDK-8282172) to pass cleanly in fastdebug mode.
> 
> Additional testing:
>  - [x] New test on Linux x86_64 fastdebug
>  - [x] New test on Linux x86_64 release
>  - [x] New test with [JDK-8264149](https://bugs.openjdk.java.net/browse/JDK-8264149) reverted fails on Linux x86_64 release

Aleksey Shipilev 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 seven additional commits since the last revision:

 - Rewrite test to use runtime class generation
 - Review comments
 - Merge branch 'master' into JDK-8282170-jvmti-setbreakpoint-test
 - Fix copyright
 - Merge branch 'master' into JDK-8282170-jvmti-setbreakpoint-test
 - Merge branch 'master' into JDK-8282170-jvmti-setbreakpoint-test
 - Fix

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7554/files
  - new: https://git.openjdk.java.net/jdk/pull/7554/files/2df7af3b..3a6f943e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7554&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7554&range=02-03

  Stats: 15566 lines in 474 files changed: 9879 ins; 3722 del; 1965 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7554.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7554/head:pull/7554

PR: https://git.openjdk.java.net/jdk/pull/7554