suppress ThreadTerminationError on monitor threads
suppress ThreadTerminationError on monitor threads

google/openhtf,fahhem/openhtf,amyxchen/openhtf,grybmadsci/openhtf,grybmadsci/openhtf,grybmadsci/openhtf,ShaperTools/openhtf,jettisonjoe/openhtf,jettisonjoe/openhtf,fahhem/openhtf,ShaperTools/openhtf,ShaperTools/openhtf,fahhem/openhtf,jettisonjoe/openhtf,fahhem/openhtf,amyxchen/openhtf,google/openhtf,google/openhtf,grybmadsci/openhtf,ShaperTools/openhtf,jettisonjoe/openhtf,google/openhtf,ShaperTools/openhtf