Update version to 3.1.2
Update version to 3.1.2

mapfish/mapfish-print,Galigeo/mapfish-print,sbrunner/mapfish-print,mapfish/mapfish-print,marcjansen/mapfish-print,marcjansen/mapfish-print,mapfish/mapfish-print,Galigeo/mapfish-print,Galigeo/mapfish-print,marcjansen/mapfish-print,sbrunner/mapfish-print,mapfish/mapfish-print,marcjansen/mapfish-print,sbrunner/mapfish-print,mapfish/mapfish-print