langtag: enable languagetag unit test again
langtag: enable languagetag unit test again

Change-Id: Ia2ed3dc0d0e135913c25e1c389326ee3fbc39719

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core