log warning message if measurement is set to None
log warning message if measurement is set to None

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