Really disable multi-threaded sheet parsing.
Really disable multi-threaded sheet parsing.

It will be removed later.

Change-Id: Ia6c2711169cd45056cbf85bc8028627d6f57b44b

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