By Ellen Sowerby LONDON (Reuters) – Veteran British rock bands Motorhead and Black Sabbath were crowned the kings of heavy metal on Monday, winning the top accolades at the UK's top metal music awards, the Metal Hammer Golden Gods. Motorhead, best known for its 1980 hit "Ace of Spades", received the Golden Gods awards at the 11th annual ceremony for making a significant contribution to the rock and heavy metal industry over nearly four decades. Black Sabbath won the award for best album for "13" which soared to No. …
