<Swing Dev> RFR: 8253820: Save test images and dumps with timestamps from client sanity suite

[Alexandre Iline]

All screen images and xml dumps, if saved with help of the library methods, are saved by adding a timestamp and a LAF name. This is useful when there is some test re-execution, so all images are preserved and it is clear which image happened first.

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Commit messages:
 - Merge branch 'master' of github.com:openjdk/jdk into JDK-8253820
 - Removed unused method.
 - JDK-8253820 Save test images and dumps with timestamps from client sanity suite

Changes: https://git.openjdk.java.net/jdk/pull/1146/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1146&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253820
  Stats: 135 lines in 3 files changed: 40 ins; 49 del; 46 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1146.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1146/head:pull/1146

PR: https://git.openjdk.java.net/jdk/pull/1146