Sorting by worker id results in wrong order (string sorting)

[macsdata]

Description:
Sorting the workers output by worker id results in the wrong sort order (string sorting instead of integer sorting).
This affects the command output and also the html report output.

Expected Behavior:
The workers should be sorted correctly with integer sorting:

1
2
...
10
11
...

Actual Behavior:
The workers are sorted with string sorting resulting in the wrong order:

1
10
11
...
2
3
...