(adds details, Moratti quotes) * Former Napoli boss pens two-year deal * Stramaccioni leaves after finishing ninth By Terry Daley ROME, May 24 (Reuters) - Inter Milan appointed former Napoli boss Walter Mazzarri as their new coach on Friday after sacking Andrea Stramaccioni following a disappointing ninth-place finish in Serie A. The 2010 Champions League winners have suffered a series of blows and gone through five coaches since their unprecedented treble under Jose Mourinho. ... More...