By Parisa Hafezi DUBAI (Reuters) -Iran’s top nuclear negotiator and a senior U.S. envoy will travel to Vienna this week for talks on reviving the 2015 nuclear pact, officials from both governments said on Wednesday, rekindling a process that stalled in June. Iran’s foreign ministry spokesperson Nasser Kanaani said Tehran was ready to reach a deal that guarantees its rights, according to state media. “(Iranian negotiator) Bagheri Kani will leave Tehran in a few hours … In this round of talks, which will be held as usual with the coordination of the European Union, ideas presented by different…