By John O'Donnell BRUSSELS (Reuters) - There are no calls for celebration, no desire to relax in the corridors of Brussels but some officials believe the euro zone has turned a corner, sharpening the focus on longer-term reforms and structures. Despite a messy bailout of Cyprus, markets are calm, Ireland's rescue program is on track and Greece and Portugal, while still in recession, hope for a slow recovery next year. Slovenia's banks are a concern, but one that policymakers are confident they can deal with. ...