By John Irish WEISSENHAUS, Germany (Reuters) -France summoned a senior Iranian diplomat on Thursday after two of its citizens were detained in Tehran in what Paris said was a baseless arrest, an incident likely to complicate ties between the countries as wider talks on reviving a nuclear deal stall. Iran’s intelligence ministry had said on Wednesday it had arrested two Europeans for allegedly fomenting “insecurity” there, but it had not revealed their nationalities. “The French government condemns this baseless arrest. It calls for the immediate release of these two French nationals,” the fore…