LONDON (Reuters) - British metal band Motorhead has canceled its summer festival appearances due to frontman Lemmy's ill health. Lemmy, 67, apologized to fans on Thursday for having to pull out of six concerts in Germany, France and Russia, while playing down his health issues saying he expected to be back in full force later this year. The band had already canceled three concerts in June after Lemmy reportedly suffering a hematoma which is when blood collects outside of a blood vessel. ...