By Michael Shields and Georgina Prodhan VIENNA (Reuters) - Sebastian Liedl is 17, and in half a year will be a fully qualified employee at the Austrian steel group Voestalpine, where he can look forward to a starting monthly wage of about 2,000 euros ($2,600). Unlike his contemporaries in Greece, Spain or Portugal, Liedl has never feared unemployment. He always knew he wanted to follow in the footsteps of his father and grandfather at Voest, where he is part of an extensive apprenticeship program. ...