jberkhahn: bump golang 1.12

JobBuild
2682
08-01 23:48
pull-service-catalog-integration 1157075515866091522
pull-service-catalog-unit 1157075515866091520
pull-service-catalog-xbuild 1157335223214542852 1157327796062654464 1157204229002104832 1157075515866091521