PARIS (Reuters) - Doubts are growing over the resilience of a Franco-German shareholder pact at the heart of EADS , placing a new timebomb under $45-billion European merger talks with British defense contractor BAE Systems . With firms already racing an October 10 deadline to overcome growing political obstacles, fears over what would happen as core EADS industrial partners seek to disinvest have set the fuse on further discord within months if BAE talks break down. ...