Fixed more FTs that were using the default service provider
Disabled ATS BatchTests and EndToEndTests due to #965
Fixing references used by the performance projects

This fixes issue #991

The TypeLoadException was incorrectly reporting that a method had no body when in reality it was unable to locate one of the dependencies. It's not clear why this exception was reported, but the error stops showing after fixing the project references (both in the csproj and in project.json), followed by a .\build initialize and a clean build of the EntityFramework solution.

The performance projects are now running properly under net45.
Tiny: Rename IsDatabaseCreated on in-memory database to EnsureDatabaseCreated because it doesn't return whether or not it is "created", but rather whether or not it was "created" by this call.