Refactor test resources to avoid collisions.

[dmuylwyk]

Refactor test resources to avoid collisions.

For example, the MNAC test Patient has a resource ID of Patient/example.

• https://github.com/cqframework/cqf-us/blob/e18c16194db0ab2e282ff8ed1fbef13eb64ccc29/input/tests/library/MNACInitialExpressions/example/Patient-example.json

We should be able to load all test resources into the same repository and be confident there won't be collisions. For example, Patient/test-mnac-001 would be a better convention for test resource identification.