By Nicola Fahey Olympic cyclist Dame Laura Kenny is being lined up for a spin on Strictly Come Dancing. Team GB’s five-times gold medallist announced her retirement two weeks ago. And bosses at the BBC hit think her discipline and winning attitude could help her add the Glitterball to her trophy cabinet. A source said: “Laura is Britain’s most successful female Olympian, with five gold medals. She’s been branded the ultimate signing for Strictly. “She has a huge fanbase in the sports world and also has a very emotional backstory – the nation loves Laura.” Laura, 31, married to fellow Team GB g…