By Anthony Deutsch AMSTERDAM (Reuters) – Amsterdam’s Schiphol airport urged travellers on Saturday to stay away as a strike by ground personnel at the start of a school holiday caused chaos at Europe’s third-busiest airport. “The terminal is too full at the moment … Schiphol is calling on travellers to not come to the airport anymore”, airport authorities said in a statement issued shortly before noon (1000 GMT). “We are very sorry to have to do this, but it is necessary to guarantee safety”, an airport spokesperson told Reuters. Police closed down highway exits to the airport on Saturday af…