brokers.yaml: Specify unit of measurement for time
brokers.yaml: Specify unit of measurement for time

selurvedu/robot_tests,Leits/robot_tests,cleardevice/robot_tests,VadimShurhal/robot_tests.broker.aps,openprocurement/robot_tests,mykhaly/robot_tests,kosaniak/robot_tests,bubanoid/robot_tests,Rzaporozhets/robot_tests,SlaOne/robot_tests