Only send queryId when using proxy server

[kmcginnes]

Description

We put the queryId in the headers for Gremlin and SPARQL requests so they can be cancelled by the proxy server. But some database endpoints will report CORS issues if the header contains unexpected values.

If we are not using the proxy server then there is no reason to have the queryId in the headers.

Validation

• Tested against Neptune
• Tested against https://id.nlm.nih.gov/mesh (SPARQL)

Related Issues

• Resolves CORS violation when not using proxy #530

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