Change `url` and `external-id` from mandatory to optional metadata
To do so
-
use the provider-url
+/
+external-id
as the origin -
don't check url
orexternal-id
-
replace tests to test the origin validation (done in diff) -
update documentation (also see TXXX)
Migrated from T1648 (view on Phabricator)
Edited by Phabricator Migration user