BRUSSELS — The EU is relaunching its elite recruitment competition after a seven-year break in an effort to find a new generation of high-level administrators to help manage the world’s second largest economy. The European Commission, which last held the competition in 2019, organizes the assessment to inject new blood into Brussels’ corridors of power. A big wage and job security await those who pass the test. “It’s a contract for life,” said András Baneth, managing partner of EU Training,