CI: allow grouping jobs by name

New build grouping feature is nice but it would be even greater if it allow grouping of jobs by name instead of grouping by number.

At the moment in order to group jobs they should be given a number accompanied by number of jobs:

test_me $job_number $jobs_total:

For example

test_me 1 2:
  script:
  - make

test_me 2 2:
  script:
  - make

We would like to be able to give jobs meaningful names instead of numbers. For instance we test a web application for different domains so it would be more useful to write something like:

test_me COM.AU 2:
  script:
  - make

test_me CO.NZ 2:
  script:
  - make

Also It would be great to get rid of number of jobs entirely and just group jobs with similar names.

Thanks.