Improve projects dev fixtures

What does this MR do?

Ensure project development fixture reports correct output as . or F. Before this change the valid_repo? method was returning false even if project repository import was successful.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content