librdf_Repository: fix missing mutex lock in various destructors
librdf_Repository: fix missing mutex lock in various destructors

Change-Id: I5756ab6ff6de0b2532bef9866063f361e330a009

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