don't leak crocodoc api key in attachment json
don't leak crocodoc api key in attachment json

Change-Id: I7dea60d27f6b07ce50f820c616129f0d89b97517
Reviewed-on: https://gerrit.instructure.com/13987
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>

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