SchemaUpdateTest is explicitly skipped for SQL Server on master.

I am adding a check for case-insensitive quoted identifiers to the test that will work to skip the test on database that store case-insensitive identifiers as lower-case or upper-case. It will not work for databases that store case-insensitive identifiers as mixed-case (like SQL Server).

Those databases that store case-insensitive identifiers in mixed-case will need to be skipped explicitly, like is already done for SQL Server.