[jdk16] RFR: JDK-8258941: Test specify the Classpath exception in the header

[Jonathan Gibbons]

Fix up legal headers.
One header is replaced by `/nodynamiccopyright/` because changing the length of the header affects the line numbers in a golden file.

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Commit messages:
 - JDK-8258941: Test specify the Classpath exception in the header

Changes: https://git.openjdk.java.net/jdk16/pull/69/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16&pr=69&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258941
  Stats: 41 lines in 7 files changed: 0 ins; 33 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk16/pull/69.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16 pull/69/head:pull/69

PR: https://git.openjdk.java.net/jdk16/pull/69