Fix Management Surveillance (J.3.1) L2 Error

[mickohanlon23]

• Update InitialIntensiveSurveillancePeriod to only look for 3 tests rather than 4
• Add a test case to show that a patient will now be considered done with their InitialIntensiveSurveillancePeriod whether they completed 4 surveillance tests or 3 surveillance tests.

This resolves Issue https://github.com/ccsm-cds-tools/ccsm-cds-with-tests/issues/51.