Issue #1986330 by bhanu951, subhojit777, marcelodornelas, ravi.shankar,...

Issue #1986330 by bhanu951, subhojit777, marcelodornelas, ravi.shankar, immaculatexavier, wheatpenny, nikunjkotecha, shashikant_chauhan, vacho, smagdits, kasperg, aron.beal, andriansyah, suresh prabhu parkala, rajeevk, benjifisher, mangy.fox, cebasqueira, stefank, richardcanoe, quietone, yesct, AkshayKalose, drdam, DevElCuy, john cook, moymilo, alexpott, xjm, dawehner, tstoeckler, webchick, akashkumar07: When Batch ID doesn't exist, Drupal should emit a 404