Issue #2296839 by MKorostoff, er.pushpinderrana | YesCT: Remove deprecated comment_num_new().
Issue #2302525 by tim.plunkett: Convert file_module_test_form to a class.
Issue #2302331 by kim.pepper: Move drupal_valid_path to PathValidator service.
Issue #1998198 by pwolanin, splatio, Albert Volkman, tim.plunkett, andypost, disasm, Les Lim, tkuldeep17: Convert user_pass_reset to a new-style Form object.