[jdk11u-dev] RFR: 8272836: Limit run time for java/lang/invoke/LFCaching tests

[Aleksey Shipilev]

Clean backport to improve testing performance.

Additional testing:
 - [x] Affected test passes

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

Commit messages:
 - Backport a3308af0605bf936d9a9fb7093787a315ccc1e2a

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/454/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=454&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272836
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/454.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/454/head:pull/454

PR: https://git.openjdk.java.net/jdk11u-dev/pull/454