Allow --headless to be disabled for unit tests.
Allow --headless to be disabled for unit tests.

Change-Id: I9f2a97715dc0d7fc5905afb1b908de97acdafc57

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