RFR: 8282170: JVMTI SetBreakpoint metaspace allocation test [v3]

[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 incrementally with one additional commit since the last revision:

  Fix copyright

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7554/files
  - new: https://git.openjdk.java.net/jdk/pull/7554/files/4edd20df..2df7af3b

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7554&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7554&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 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