ENH: modified REGEX to have spaces in TEST macros
ENH: modified REGEX to have spaces in TEST macros

Before TEST( TestGroup, TestName ), would not automatically be added
to ctest. Modified to regular expression to fix this.

SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging,SimpleITK/Staging