[YAML schema] Fix candidate key to meta

[zaliqarosli]

Brief summary of changes

When querying a specific candidate with api/v0.0.4-dev/candidates/$id/ endpoint, the returned object looks like this:

{"Meta":{"CandID":"000001","Project":"COPN","PSCID":"CA0003","Site":"University of Calgary","EDC":null,"DoB":"1956-01-01","Sex":"Male"},"Visits":{"InitialVisit":"99999","SampleCollection01":"99991"}}

The inline_response_200_2 object should have the 'Meta' property instead of 'Candidate' as key to the Candidate object

Testing instructions (if applicable)

Link(s) to related issue(s)

• Resolves # (Reference the issue this fixes, if any.)

[zaliqarosli]

@driusan let me know if this should go to a release branch instead for a bugfix

[driusan]

@zaliqarosli If I'm understanding the schema.yml correctly this looks like a bug fix that brings it inline with the markdown documentation, so I think this should go to a release branch, but I'm not 100% sure if my parsing of the YML is correct so I'd like @xlecours to confirm/review before merging.

[zaliqarosli]

@driusan yes exactly, the correct key in the code is also 'Meta'