By Chavi Mehta (Reuters) -IBM Corp beat quarterly revenue estimates on Wednesday and said it expects to exceed full-year revenue growth targets as robust demand for its digital services helps cushion the blow from a strong dollar. The IT software and services provider has been focusing on the so-called “hybrid cloud” after spinning off its legacy IT-managed infrastructure business and posted double-digit growth across all its segments and geographies on a constant-currency basis for the third quarter. The company’s shares rose 6% in trading after the bell. IBM, whose cloud revenue rose 11% to …