ISTANBUL (REUTERS) - President Recep Tayyip Erdogan has defended his decision to accept a luxury plane from Qatar at a time of economic hardship, saying it was a gift, not a purchase, and that it had been donated to the Turkish state, not to him personally. State broadcaster TRT Haber said last week the Emir of Qatar Sheikh Tamim bin Hamad al-Thani had given Mr Erdogan the aircraft, which Turkish media said was a Boeing 747, sparking criticism from Turkey's opposition. A lawmaker from the main opposition Republican People's Party (CHP), Mr Sezgin Tanrikulu, had expressed concern that the aircraft...