[jdk8u-dev] RFR: 8160974: [TESTBUG] Mark more headful tests with @key headful. [v2]

[ktakakuri]

> 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.

ktakakuri 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 two additional commits since the last revision:

 - Merge branch 'master' into 8160974
 - Backport e52b963d0cdc49e2048757eae2e4b10bb279f296

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

Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/383/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/383/files/8983a17a..7fb82b04

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=383&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=383&range=00-01

  Stats: 4927 lines in 673 files changed: 2003 ins; 2267 del; 657 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