RFR: 8343875: Minor improvements of jpackage test library

[Alexey Semenyuk]

On Fri, 8 Nov 2024 23:57:58 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

> The PR affects jpackage test library only. Changes:
> 
> - Removed dependencies on `java.io.File`. `java.io.File.pathSeparator` is still used as there is no better alternative.
> - Use `TKit.concatMessages()` instead of `String.format()` in TKit.assert...() methods.
> - Added unit tests for all TKit.assert...() modified methods.
> - Added unit tests for `JavaAppDesc` class.
> - Added `jdk.jpackage.test.TestSuite` class to automatically run all jpackage test library unit tests. This eliminates the need to add jtreg comments to every jpackage test library unit test java source.

@sashamatveev ptal

test/jdk/tools/jpackage/helpers/jdk/jpackage/test/JavaAppDesc.java line 178:

> 176:         return Objects.equals(this.srcJavaPath, other.srcJavaPath);
> 177:     }
> 178: 

Netbeans generated code

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PR Comment: https://git.openjdk.org/jdk/pull/21995#issuecomment-2471725192
PR Review Comment: https://git.openjdk.org/jdk/pull/21995#discussion_r1835169118