RFR: 8272836: Limit run time for java/lang/invoke/LFCaching tests [v2]

[Aleksey Shipilev]

> See the RFE for discussion.
> 
> Current PR improves the test time like this:
> 
> 
> $  make run-test TEST=java/lang/invoke/LFCaching/
> 
> # Before
> real	3m51.608s
> user	5m21.612s
> sys	0m5.391s
> 
> # After
> real	1m13.606s
> user	2m26.827s
> sys	0m4.761s

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 three additional commits since the last revision:

 - Make the timeout depend on global timeout with lower multiplier
 - Merge branch 'master' into JDK-8272836-perf-test-lfcaching
 - 8272836: Optimize run time for java/lang/invoke/LFCaching tests

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5214/files
  - new: https://git.openjdk.java.net/jdk/pull/5214/files/85e6287f..f694626a

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5214&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5214&range=00-01

  Stats: 6245 lines in 278 files changed: 4320 ins; 1044 del; 881 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5214.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5214/head:pull/5214

PR: https://git.openjdk.java.net/jdk/pull/5214