Update unit_tests.sql to replace square brackets with double quotes

[danakee]

Replace square brackets with double quotes and insert "." between schema and view in setting of test_view and expected_view.

Result was [dbo.testview_123] will now be "dbo"."testview_123" Result was [dbo.expectedview_123] will now be "dbo"."expectedview_123"

[cody-scott]

Happy to merge this but you'll need to create a unit test to capture the breaking behaviour first before it can be merged.