Fix spss script

Summary

• spss_to_datamodel script works again.
• Alias linkahead-crawler script.

Focus

Does it work? Are the tests OK?

Test Environment

Run unit tests, especially unittests/test_scripts.py

Check List for the Author

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• All automated tests pass
• Reference related issues
• 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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Check List for the Reviewer

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