RFR: 8281268: Resolve duplication of test ClassTransformer class

[Kevin Walls]

On Fri, 13 May 2022 22:50:11 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

> The fix deletes ClassTransformer class from jdi, switches all the test to jdk.test.lib copy.

Looks good.  Those are the only imports I can see for this, and the ClassTransformer.java text is the same in both places.

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Marked as reviewed by kevinw (Committer).

PR: https://git.openjdk.java.net/jdk/pull/8710