RFR: 8167015: compiler/codecache/jmx/PoolsIndependenceTest.java timeout [v2]

[Evgeny Nikitin]

> Fixed some issues in the test:
> 
> 1. Replaced obvious mistake with event duration equal to `beginTimestamp - lastEventTimestamp` (giving negative value)
> 2. Using timeouts to address the problem with notification not being sent due to code cache usage never hitting the limit. Possible explanations:
>     Code cache was cleaned just after setting the limit;
>     CodeCacheUtils silently failed the blob allocation, causing the notification to never get fired
> 3. Provided some additional info in both the test log, and failure messages.

Evgeny Nikitin 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 'master' into JDK-8167015/public
 - Un-problemlist the PoolsIndependenceTest
 - 8167015: compiler/codecache/jmx/PoolsIndependenceTest.java timeout

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3033/files
  - new: https://git.openjdk.java.net/jdk/pull/3033/files/5d41df63..d464ca35

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3033&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3033&range=00-01

  Stats: 74918 lines in 2689 files changed: 50234 ins; 13865 del; 10819 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3033.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3033/head:pull/3033

PR: https://git.openjdk.java.net/jdk/pull/3033