The test doesn't need to depend on what extensions are
available/installed. Also pass the test config more explicitly to
ServiceOptions.
Needed-by: I0a04c82250582fed7a66c1e10868d9b4f3823a28
Change-Id: Id2587fe7d31fcd652c26e5dd0a8cfcae3161efcc
The MathEntitySelector gets its config from wbRepo which caused a hard
dependency on the Wikibase client.
If the Wikibase client config is not available a default value (wikidata)
is used to determine the URL of the foreign repo.
As the dropdown will never do write operations, we restrict the repo
access to anonymous read only.
Bug: T313143
Change-Id: Iba33dfd32a78f4ad7c2e99a1f56218458ab884b4