[Add some test]

   - ShouldFindOneYInMysterious test added to
     ChapterOneExample.UnitTests.UtilitiesTests class.

   - ShoudFindTwoSInMysterious test added to
     ChapterOneExample.UnitTests.UtilitiesTests class.

   - SearchShouldBeCaseSensitive test added to
     ChapterOneExample.UnitTests.UtilitiesTests class.

   - Fix some bad soluction's config.