Update db_seed with consistent case records

[andrew-jameson]

Description:
From this comment, @elipe17 found that we should be rejecting the record on cat4 grounds but that we were not and would need to add an increment of num_errors within the validate() call of case_consistency_validator.py.

Acceptance Criteria:

• db_seed can correctly generate a case that passes cat 4 validation
• Testing Checklist has been run and all tests pass
• README is updated, if necessary

Tasks:

• Increment num_errors
• update seed_db.py to implement internally consistent case records
• ensure we still get occasional cat4 errors/failures [stretch?]
• Run Testing Checklist and confirm all tests pass

Notes:

Supporting Documentation:

Open Questions:

• Do we want to add the increment and reject all records of a case with any cat4 issues?