Stop spring before resetting DB in scripts/regenerate-schema

What does this MR do?

If spring is running, the regenerate-schema script will fail when it tries to run db:reset.

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