Changed wait for subprocess to poll
Changed wait for subprocess to poll

The wait is a suspect in a MAC issue. CURA-1300

hmflash/Cura,totalretribution/Cura,Curahelper/Cura,Curahelper/Cura,totalretribution/Cura,ynotstartups/Wanhao,ynotstartups/Wanhao,fieldOfView/Cura,senttech/Cura,fieldOfView/Cura,hmflash/Cura,senttech/Cura