3.0 isolate failling test for insert on sqlServer

Not sure you'll find this helpfull but I isolated all the falling tests on sql server so the appveyor build can pass again.
I'm not sure how to fix those tests, the major problem is an error saying that 
``Connection is busy with results for another command``.

If we don't care at this point and/or someone want to handle this in a better way, feel free to just close the PR.