Its a war of petition! Marine Park moms are squaring off against local seniors in a battle over three handicap-parking spots the city is installing at a senior center located in Brooklyn’s biggest green space. Disabled seniors say they need the spots to access services at the Carmine Carro Community Center — which attracts thousands of oldsters with free activities and workshops — while parents claim that inviting traffic through the park will put their kids in danger, and both sides have launched dueling petitions in opposition to one another! “I started a petition that reached…