filter out Test and Testsuite directory in release mode

Scripts/developer_scripts/cgal_create_release_with_cmake.cmake

@@ -30,6 +30,10 @@ function(process_package pkg)
       set(afile ${pkg_dir}/${f})
       get_filename_component(afile_dir_tmp ${afile} PATH)
       string(REPLACE "${pkg_dir}" "" afile_dir ${afile_dir_tmp})
+      # skip test files not shipped with a release
+      if (NOT TESTSUITE AND ("${afile_dir}" STREQUAL "/include/CGAL/Test" OR "${afile_dir}" STREQUAL "/include/CGAL/Testsuite") )
+        continue()
+      endif()
       if(NOT IS_DIRECTORY ${release_dir}/${afile_dir})
         file(MAKE_DIRECTORY ${release_dir}/${afile_dir})
       endif()