suite stats: fixed setting parent suite stats, added fixme/todo about updating parent stats when suite teardown fails
suite stats: fixed setting parent suite stats, added fixme/todo about updating parent stats when suite teardown fails

Senseg/robotframework,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,Senseg/robotframework,Senseg/robotframework,Senseg/robotframework,Senseg/robotframework,userzimmermann/robotframework-python3