Removed FileClassScannerTest dependency to "Magento_Catalog"

[wexo-team]

Description

Code optimization that makes a current test testClassKeywordInMiddleOfFile stand on its own since is the only test in FileClassScannerTest to not include its own test data.

Process

Looked at the original error fixed by 4e8d1d6 and reproduced what it needed from app/code/Magento/Catalog/Model/ResourceModel/Product/Indexer/Eav/AbstractEav.php
to test for the problem "FileClassScannerTest not liking one case when the word "class" was in a class" as described in commit message 4e8d1d6. Found the problem to only be triggered when string variable interpolation was also being used in the class.
On this basis, the name of the test was changed to testMultipleClassKeywordsInMiddleOfFileWithStringVariableParsing

Motivation behind this change came from experiencing the issue #11230

To test this code

1. git checkout 4e8d1d612a98cbe35e7782faba5c0609935a1c2a~1
2. composer install
3. Insert new method \Magento\Setup\Test\Unit\Module\Di\Code\Reader\FileClassScannerTest::testMultipleClassKeywordsInMiddleOfFileWithStringVariableParsing() found in 6cf723a945fe7e490fc223b8092ffdc8e3dff910 (the commit from this pull requst) into setup/src/Magento/Setup/Test/Unit/Module/Di/Code/Reader/FileClassScannerTest.php
4. Run the unit test to see that it fails as expected (example ./vendor/bin/phpunit -c dev/tests/unit/phpunit.xml.dist --filter testMultipleClassKeywordsInMiddleOfFileWithStringVariableParsing setup/src/Magento/Setup/Test/Unit/Module/Di/Code/Reader/FileClassScannerTest.php)

Fixes Issue

• Unit test fails after fresh installation #11230

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-cicd2]

All committers have signed the CLA.

[wexo-team]

@magento-engcom-team can you provide info about how this got the label "Cannot Reproduce"?

[dmanners]

@wexo-team the label has been copied from a linked issue. It has been removed now.