Passengers unaffected by an illness outbreak on a British cruise ship have been allowed off the ship in Bordeaux , while authorities confirmed the cause of the outbreak is norovirus, a nasty stomach bug that spreads easily. French authorities had initially ordered over 1,700 passengers and crew on The Ambition cruise ship to remain on board, but then decided late Wednesday to let those unaffected disembark. One passenger was spotted raising his arms in triumph while leaving the vessel. It was not immediately clear how many left the ship. French authorities said there is no link to a deadly hantavirus outbreak on a Dutch vessel that has put European health authorities on alert in recent weeks. The Ambition was midway through a 14-night cruise from Belfast and Liverpool, with scheduled stops in northern Spain and along France’s Atlantic coast when it was struck by the outbreak. It reached Bordeaux on Tuesday evening, according to the operator, Ambassador Cruise Line.…