[jdk11u-dev] RFR: 8237589: Fix copyright header formatting

[Christoph Langer]

This is a backport of 8237589. I applied the original change and had then to resolve several places where copyright changed in the meanwhile in 11u. Also, a few files that were touched in the original change don't exist in 11u.

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

Commit messages:
 - Backport 3318314c7cdfe4e3b794fdf7008b58227cd78c4b

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/490/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=490&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8237589
  Stats: 61 lines in 57 files changed: 4 ins; 0 del; 57 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/490.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/490/head:pull/490

PR: https://git.openjdk.java.net/jdk11u-dev/pull/490