Split tests into parameter testing and value testing

[brentschmaltz]

Some changes to set a pattern for coding style.

Separate TheoryData sets for parameter testing vs. functional testing.
Instead of setting TheoryData.TestId, pass the testId to base.
Then pass theoryData.CallContext inside the test method, rather than passing 'new CallContext()' this gives you two things.

1. stepping into the method avoids stepping through the ctor of CallContext.
2. More importantly, by passing the testId to base, theoryData.CallContext.DebugId is set to testId, which allows for setting a conditional breakpoint deep into the call graph. When a test case has many variations, this is very helpful.