RFR: 8260461: Modernize jsr166 tck tests [v2]

[Martin Buchholz]

> 8260461: Modernize jsr166 tck tests

Martin Buchholz has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  JDK-8260461

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Changes: https://git.openjdk.java.net/jdk/pull/2245/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2245&range=01
  Stats: 7616 lines in 71 files changed: 318 ins; 187 del; 7111 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2245.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2245/head:pull/2245

PR: https://git.openjdk.java.net/jdk/pull/2245