Get aggregated time spents for given person and week.
GET
/data/persons/{person_id}/time-spents/week/{year}/{week}
curl \
-X GET http://api.example.com/data/persons/{person_id}/time-spents/week/{year}/{week}
curl \
-X GET http://api.example.com/data/persons/{person_id}/time-spents/week/{year}/{week}