SPRINGFIELD — Hours after allegations of sexual harassment surfaced against House Speaker Michael Madigan’s chief of staff, Madigan ordered him to resign.Sherri Garrett, account technician and minutes clerk for the speaker’s office, spoke out against Democratic Rep. Tim Mapes at a news conference in Chicago on Wednesday, saying she experienced harassment and bullying from Mapes for many years.She accused him of making jokes about sexual harassment training and making inappropriate comments about her …