create tests to ensure MD-SAL backward compatibility from Beryllium to Lithium

The goal is to make sure that the MD-SAL APIs are backward compatible with Lithium. The obvious way to to do this would be to test Lithium-SR1 code against the backward-compatible APIs in Beryllium. This would involve a version bump (or version ranges) in Lithium-SR1, but could still likely be automated by creating local changes.