RawMode is now deprecated in core and causes warnings during tests that cause the tests to fail.
and we don't want to use RawMode anyway.
https://integration.wikimedia.org/ci/job/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/288/console
```
10:42:04 There was 1 error:
10:42:04
10:42:04 1) WikibaseQuality\ExternalValidation\Tests\Api\RunCrossCheckTest::testExecuteWholeItem
10:42:04 Use of ApiResult::getIsRawMode was deprecated in MediaWiki 1.25. [Called from WikibaseQuality\ExternalValidation\Api\RunCrossCheck::writeResultOutput in /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/extensions/WikibaseQualityExternalValidation/api/RunCrossCheck.php at line 174]
10:42:04
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/includes/debug/MWDebug.php:300
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/includes/debug/MWDebug.php:233
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/includes/GlobalFunctions.php:1195
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/includes/api/ApiResult.php:1222
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/extensions/WikibaseQualityExternalValidation/api/RunCrossCheck.php:174
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/extensions/WikibaseQualityExternalValidation/api/RunCrossCheck.php:140
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/includes/api/ApiMain.php:1233
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/includes/api/ApiMain.php:403
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/tests/phpunit/includes/api/ApiTestCase.php:116
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/extensions/WikibaseQualityExternalValidation/tests/phpunit/Api/RunCrossCheckTest.php:202
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/tests/phpunit/MediaWikiTestCase.php:131
10:42:04
10:42:04 --
10:42:04
10:42:04
10:42:04 There were 2 failures:
10:42:04
10:42:04 1) WikibaseQuality\ExternalValidation\Tests\Api\RunCrossCheckTest::testExecutePropertyFilter
10:42:04 Failed asserting that an array has the key 'Q2'.
10:42:04
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/extensions/WikibaseQualityExternalValidation/tests/phpunit/Api/RunCrossCheckTest.php:221
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/tests/phpunit/MediaWikiTestCase.php:131
10:42:04
10:42:04 2) WikibaseQuality\ExternalValidation\Tests\Api\RunCrossCheckTest::testExecuteSingleClaim
10:42:04 Failed asserting that an array has the key 'Q2'.
10:42:04
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/extensions/WikibaseQualityExternalValidation/tests/phpunit/Api/RunCrossCheckTest.php:244
10:42:04 /mnt/jenkins-workspace/workspace/mwext-WikibaseQualityExternalValidation-repo-tests-mysql-hhvm/src/tests/phpunit/MediaWikiTestCase.php:131
```