Adam Williamson b97c019ae9 revise language tag handling to be easier to use (T617) ...

Summary:
T617 makes some good points about the language tags; this is my
suggestion for an improvement. It requires a bit of cleverness
in unregister_prefix_tags(), but the upshot is that you don't
need to know to set any special tags when creating needles, a
needle with no language-related tags will be considered as valid
for all languages. You have to explicitly add LANGUAGE- tag(s)
to a needle for the language filtering to 'kick in' in any way.
If a needle has at least one LANGUAGE- tag, it will be filtered
unless it has the appropriate tag for the job's specified
language (default is still 'english').

With this approach, only needles which we specifically want to
*only* match their tagged language(s) need the tags, so we can
drop all those -ALL tags.

We're using LANGUAGE- instead of ENV-LANGUAGE- now because the
ENV- tag names denote tags that are treated slightly specially
by openQA, and this is not one. We cannot cleanly use
ENV-INSTLANG because openQA has a hardwired default of 'en_US'
for that.

Test Plan:
Check both English and French tests still work as
intended.

Reviewers: jskladan, garretraziel

Reviewed By: garretraziel

Subscribers: tflink

Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D589

2015-09-29 15:52:50 -07:00

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