RFR(XS): 8244094: Fix Amazon copyright in various test files

[Volker Simonis]

Hi,

can I please get a review for the following trivial change which fixes
the Amazon copyright in several test files:

http://cr.openjdk.java.net/~simonis/webrevs/2020/8244094/
https://bugs.openjdk.java.net/browse/JDK-8244094

Notice that the new version intentionally contains no copyright year any
more.

Thank you and best regards,
Volker





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