(Reuters) — Australian carrier Qantas Airways Ltd plans to cut 15 percent of its workforce, sell older jets and reduce capital spending after reporting a first-half loss amid growing competition in both international and domestic operations. The deep cuts are part of Qantas’ plans to slash costs by A$2 billion ($1.8 billion) over the next three years – a bid by the airline to convince the federal government and investors it is worthy of the state assistance it says it […]