MSTEST0006: Add code fix

[engyebrahim]

AB#2200928

[Youssef1313]

I don't think we can provide a good codefix here is it mostly depends on user intent. We have a test method marked with ExpectedException attribute but can't statically "guess" at which line the exception is expected. The best the codefix can do is to wrap the whole test method with Assert.ThrowsException, but it's not ideal.

[Evangelink]

You are right but I was thinking to provide the following 2 codefixes:

1. Wrap all content
2. Wrap last statement. This is only an heuristic but this should be the last line of code actually executed in most of the "correct" scenario.

WDYT?