Removed 1 unnecessary stubbing in UploadAppToResourceTaskTest.java

[ARUS2023]

Testing done

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In our analysis of the project, we observed that: 1 stubbing in UploadAppToResourceTaskTest.setUp is created but never executed by the testUploadAppToResourceTaskTest.should_ReturnDebugSymbolUploadId_When_DebugSymbolsAreFound_ChunkedMode.

Unnecessary stubbings are stubbed method calls that were never realized during test execution. Mockito recommends to remove unnecessary stubbings (https://www.javadoc.io/doc/org.mockito/mockito-core/latest/org/mockito/exceptions/misusing/UnnecessaryStubbingException.html).

We propose below a solution to remove the unnecessary stubbing.