def cmp_err(test)
      test.err_result = FileUtils.cmp(test.expected_err_path,
                                      test.result_err_path)
    end
def cmp_err(test)
      test.err_result = FileUtils.cmp(test.expected_err_path,
                                      test.result_err_path)
    end
Compare a tests expected and result stderr
 Sets the result of the comparison to err_result in the test

 test - A test object that has been run

 Returns nothing