test: Replace self.nodes[0].p2p with conn
test: Replace self.nodes[0].p2p with conn

Former-commit-id: 46aa5047acf59d4be9005be27be488313e19fbf8
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin