ENH: Test for issue caosdb-server#192 (automatic name for mass-imported File entities)

Summary

The changes now check that there is NO name for the InsertFilesInDir files any more.

Focus

Did I miss anything? Is a None name correct?

Test Environment

• Set up the integration tests as usual, also make sure that the test_files.test_insert_files_in_dir.{local,server} variables in pycaosdb.ini are usable.
• pytest tests/test_file.py

Check List for the Author

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• All automated tests pass
• Reference related issues caosdb/customers/umg/management#68
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
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• Annotations in code (Gitlab comments)
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  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.