https://integration.wikimedia.org/ci/job/mediawiki-extensions-qunit-jessie/19494/console fails due a `Cannot find site mywiki in sites table` error which is injected in a javascript file `/index.php?title=Special:JavaScriptTest/qunit/export`. That causes the web browser to not process the javascript and thus fail the qunit build.
From a previous discussion, it seems the fix would be to properly initializing the site table when installing/updating MediaWiki with Wikibase: T126596
```
00:02:38 PHP Notice: Cannot find site mywiki in sites table [Called from Wikibase\Client\WikibaseClient::newSiteGroup in /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Wikidata/extensions/Wikibase/client/includes/WikibaseClient.php at line 734] in /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/debug/MWDebug.php on line 309
00:02:38 PHP Stack trace:
00:02:38 PHP 1. {main}() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/maintenance/update.php:0
00:02:38 PHP 2. require_once() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/maintenance/update.php:217
00:02:38 PHP 3. UpdateMediaWiki->execute() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/maintenance/doMaintenance.php:111
00:02:38 PHP 4. LoggedUpdateMaintenance->execute() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/maintenance/update.php:184
00:02:38 PHP 5. FlowCreateTemplates->doDBUpdates() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/maintenance/Maintenance.php:1576
00:02:38 PHP 6. FlowCreateTemplates->create() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Flow/maintenance/FlowCreateTemplates.php:86
00:02:38 PHP 7. WikiPage->doEditContent() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Flow/maintenance/FlowCreateTemplates.php:115
00:02:38 PHP 8. WikiPage->prepareContentForEdit() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/page/WikiPage.php:1688
00:02:38 PHP 9. AbstractContent->getParserOutput() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/page/WikiPage.php:2153
00:02:38 PHP 10. Hooks::run() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/content/AbstractContent.php:501
00:02:38 PHP 11. call_user_func_array:{/home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/Hooks.php:195}() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/Hooks.php:195
00:02:38 PHP 12. Wikibase\Client\Hooks\ParserOutputUpdateHookHandlers::onContentAlterParserOutput() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/Hooks.php:195
00:02:38 PHP 13. Wikibase\Client\Hooks\ParserOutputUpdateHookHandlers::newFromGlobalState() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Wikidata/extensions/Wikibase/client/includes/Hooks/ParserOutputUpdateHookHandlers.php:67
00:02:38 PHP 14. Wikibase\Client\WikibaseClient->getLangLinkHandler() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Wikidata/extensions/Wikibase/client/includes/Hooks/ParserOutputUpdateHookHandlers.php:48
00:02:38 PHP 15. Wikibase\Client\WikibaseClient->getLangLinkSiteGroup() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Wikidata/extensions/Wikibase/client/includes/WikibaseClient.php:847
00:02:38 PHP 16. Wikibase\Client\WikibaseClient->getSiteGroup() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Wikidata/extensions/Wikibase/client/includes/WikibaseClient.php:713
00:02:38 PHP 17. Wikibase\Client\WikibaseClient->newSiteGroup() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Wikidata/extensions/Wikibase/client/includes/WikibaseClient.php:752
00:02:38 PHP 18. wfWarn() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/extensions/Wikidata/extensions/Wikibase/client/includes/WikibaseClient.php:734
00:02:38 PHP 19. MWDebug::warning() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/GlobalFunctions.php:1142
00:02:38 PHP 20. MWDebug::sendMessage() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/debug/MWDebug.php:164
00:02:38 PHP 21. trigger_error() /home/jenkins/workspace/mediawiki-extensions-qunit-jessie/src/includes/debug/MWDebug.php:309
```