TUCSON – It didn’t take long for the card to take on the city’s identity. Tucson calls itself The Old Pueblo. That also means old school, which is what Manny Guajardo was in scoring a resilient four-round decision over Johnathan Espino. Guajardo (5-0), a Tucson middleweight, rocked Espino early. But Espino (2-4, 2 KOs), of …