Re-organize UNO interface members & use clear() to clear their refs.
Re-organize UNO interface members & use clear() to clear their refs.

Change-Id: I815e77640c7c3816e5b9c83b567a8e2051cdb81f

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