Add millisecond UOM code
Add millisecond UOM code

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