RFR: 8299146: No copyright statement on ArtifactResolverException.java [v2]

[Xue-Lei Andrew Fan]

> The copyright statement was missed in the test file, test/lib/jdk/test/lib/artifacts/ArtifactResolverException.java.  The file was added in [JDK 11](http://hg.openjdk.java.net/jdk/jdk/rev/e59941f7247d) by @erikj79 at 2018.  This update is trying to add the copyright back.

Xue-Lei Andrew Fan has updated the pull request incrementally with one additional commit since the last revision:

  add update year

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/11743/files
  - new: https://git.openjdk.org/jdk/pull/11743/files/39ef0716..8e1e913a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11743&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11743&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/11743.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11743/head:pull/11743

PR: https://git.openjdk.org/jdk/pull/11743