We have a `unittest_try_name` for all unit test tasks, and similarly a
`talos_try_name`. The `-j` flag controls tasks known as "jobs" (although the
word has dozens of other meanings, too). Some of those set `job_try_name`, but
others do not and have special-case support in `try_option_syntax.py`. With
this change, all "jobs" set `job_try_name` and the special-case is removed.
MozReview-Commit-ID: 9hvW7wBIl2B
--HG--
extra : rebase_source : 120b5e9e7aa8f81fe49e72f4dadafdbd145ac357
