Validate 2.1a sample files against the 2.1b changes and Fix any discovered issues to make compatible

Summary of outcomes for Data Standard 2.1

• Problem Addressed: Sample data files no longer validate following updates made for 2.1b RFC.
• High-level Reasoning: Sample data should be updated to appropriately reflect changes made for 2.1b.
• Changes Made: Updated sample xml files to validate against updated schema

Original ticket description follows:

Validate 2.1a sample files against the 2.1b changes - update for 2.1b compatibility

(Once the 2.1b schema is final on 5/12)