Implement "Roundtrip" Tests to Improve Integrity

The project should implement "roundtrip" tests in order to exercise validation and, hopefully, help prevent the defects that led to the need to release v9.01 and v9.02

1. Parse BOM that is known to be valid
2. Generate a BOM based on what has been parsed
3. Compare input and output - Should be the same, otherwise either parsing or generation is broken
4. Validate output against schema - Should be valid, otherwise generation is broken