It is not possible to move down from project info, since there are no 'labels'
list which in our case represents slave builders. For example i have a task
with four slaves. Using API i can't get their names, which called 'labels'. So
i can get 'http://hudson:8080/job/job_name/api/xml' but to get 'http://
hudson:8080/job/job_name/label=xxx/api/xml' I have to know that i should look
into 'xxx' label. Is there a way to see labels list for particular matrix job?