Add container validation on ContainerBoxContainer clean method
Add container validation on ContainerBoxContainer clean method

YACOWS/opps,williamroot/opps,YACOWS/opps,jeanmask/opps,opps/opps,jeanmask/opps,opps/opps,williamroot/opps,williamroot/opps,YACOWS/opps,opps/opps,YACOWS/opps,jeanmask/opps,jeanmask/opps,opps/opps,williamroot/opps