## Description
In mswTestRunner.js, we check for the presence of metadata elements inserted by orchestrator code. We should similarly check for metadata elements inserted by evaluator code.
Most (but not necessarily all) of the required checks can be provided in **integrationTest.js** by
- Declaring `standardMetaData`
- Adding arguments `expectedExtraMetadata` and `expectedMissingMetadata` to `evaluatorIntegrationTest`
- Adding code to `evaluatorIntegrationTest` to check for the presence of metadata elements, probably in the code block starting with `if ( expectedOutput !== null )`
- Updating calls to `evaluatorIntegrationTest` as needed.
The above can mimic what's present in orchestrator code **mswTestRunner.js**.
**Desired behavior/Acceptance criteria (returned value, expected error, performance expectations, etc.)**
* See above
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## Completion checklist
* [ ] Before closing this task, review one by one the checklist available here: https://www.mediawiki.org/wiki/Abstract_Wikipedia_team/Definition_of_Done#Back-end_Task/Bug_completion_checklist