[jdk18u] RFR: 8282042: [testbug] FileEncodingTest.java depends on default encoding

[Tyler Steele]

On Fri, 8 Apr 2022 22:16:01 GMT, Tyler Steele <duke at openjdk.java.net> wrote:

> Backporting this small testbug fix to jdk18u as requested [here](https://github.com/eclipse-openj9/openj9/issues/14472#issuecomment-1048328921)
> 
> This issue fixes a testbug present on AIX.

@RealCLanger I am looking for a sponsor on this PR, and I see that you are pretty active here. Would you mind taking a look at this one?

Many thanks :slightly_smiling_face:

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PR: https://git.openjdk.java.net/jdk18u/pull/96