Fix for issue #37 - Multiple SetUp Fixtures should be permitted on same ...

This should make it possible to use more than one SetUp fixture per namespace. The order they are executed in is not defined and depends on the implementation of the .NET Framework.

In principle, the two OneTimeSetUps could occur in any order. Is this passing in all builds? Which ones have you tested?

In some other tests, we have done a more complex verification, where we allow for variations of order. However, if everything is passing for the moment, we can keep the more simple check here.