Added launcher config option to hide stdout or stderr from display.
Added launcher config option to hide stdout or stderr from display.

bradleylandis/testem,Addepar/testem,bradleylandis/testem,johanneswuerbach/testem,testem/testem,fotinakis/testem,paulot/testem,johanneswuerbach/testem,testem/testem,fotinakis/testem,testem/testem,Addepar/testem,paulot/testem,bradleylandis/testem,Addepar/testem,paulot/testem,Addepar/testem,johanneswuerbach/testem,fotinakis/testem