By Steve Holland, Parisa Hafezi and Maayan Lubell EVIAN-LES-BAINS, France/DUBAI/JERUSALEM, June 16 (Reuters) - Doubts swirled around the U.S.-Iran interim deal to end the war in the Middle East as shippers said it could take weeks for confidence to return after any reopening of the Strait of Hormuz, and fundamental questions remained unanswered.