RFR: 8292592: JFR test TestNative is not reliable due to low rate of sampling. [v2]

[Robbin Ehn]

> Split TestNative into two different test, so native sampling can have a high frequency.

Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:

  Fixed includes

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9915/files
  - new: https://git.openjdk.org/jdk/pull/9915/files/4b19fef9..0605ef2a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9915&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9915&range=00-01

  Stats: 10 lines in 2 files changed: 0 ins; 10 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/9915.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9915/head:pull/9915

PR: https://git.openjdk.org/jdk/pull/9915