[jdk8u-dev] RFR: 8160974: [TESTBUG] Mark more headful tests with @key headful. [v6]

[Kazuhisa Takakuri]

> This is a backport of JDK-8160974: [TESTBUG] Mark more headful tests with @key headful.
> 
> This patch has already been applied to OracleJDK8.
> As noted in the Bug Issue comments, some tests do not exist in 8u.

Kazuhisa Takakuri has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains six commits:

 - Merge branch 'master' into 8160974
 - Backport e52b963d0cdc49e2048757eae2e4b10bb279f296
 - Backport e52b963d0cdc49e2048757eae2e4b10bb279f296
 - Merge branch 'master' into 8160974
 - Merge branch 'master' into 8160974
 - Backport e52b963d0cdc49e2048757eae2e4b10bb279f296

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Changes: https://git.openjdk.org/jdk8u-dev/pull/383/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=383&range=05
  Stats: 1049 lines in 533 files changed: 633 ins; 1 del; 415 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/383.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/383/head:pull/383

PR: https://git.openjdk.org/jdk8u-dev/pull/383