By Stanley Carvalho ABU DHABI (Reuters) – Abu Dhabi hopes the opening of a $1 billion Warner Bros theme park in July will help it in its bid to nearly double the number of tourists visiting the emirate over the next few years. Oil-rich Abu Dhabi is investing billions of dollars in tourism, industry and infrastructure to diversify its economy away from oil. It is already home to the Louvre Abu Dhabi, Formula 1 Etihad Airways Abu Dhabi Grand Prix, Ferrari World and the Yas Water Park. Two more museums – the Guggenheim and the Zayed National Museum – are being built as well as a SeaWorld theme park. The Warner Bros park will be an added attraction, but with neighboring Dubai already a leading tourist destination and given the huge investment in the theme…