By Foo Yun Chee BRUSSELS (Reuters) -British Airways owner IAG’s bid to buy out Air Europa may reduce competition on domestic, short-haul and long-haul routes, EU antitrust regulators said on Wednesday as they opened a full-scale probe into the 400-million-euro ($435.9 million) deal. The deal underlines the wave of consolidation among airlines, with Germany’s Lufthansa seeking to buy a minority stake in Italy’s state-owned ITA Airways, and Korean Air looking to buy Asiana. IAG, which also owns Iberia, said last February it had agreed to buy the 80% of Air Europa it did not already own from Spai…