Hazelwood Integrated primary school in North Belfast is a symbol of efforts to bring together a divided city. The school stands next to a barrier – one of 59 “peace walls”, or fences, that still separate Catholic and Protestant communities in the capital. It was built in 2008, 10 years after the Good Friday agreement. Now Patricia Murtagh, Hazelwood’s principal, is among those celebrating a Nobel peace prize nomination for the Integrated Schools Movement, created in the 1970s, the most…