James Baiera 5535ff0a44
Fix IngestService to respect original document content type (#45799) (#45984)
Backport of #45799

This PR modifies the logic in IngestService to preserve the original content type 
on the IndexRequest, such that when a document with a content type like SMILE 
is submitted to a pipeline, the resulting document that is persisted will remain in 
the original content type (SMILE in this case).
2019-08-26 14:33:33 -04:00
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