CXX-1130 Implement GridFS Spec

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• Closed

CXX-1308 Add basic integration tests for GridFS bucket methods other than open_upload_stream()/open_download_stream()

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• Closed

CXX-1318 Add GridFS integration tests which upload/download files of size >4 GB

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• Closed

CXX-1345 Add integration tests for proper index creation in GridFS

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• Backlog

CXX-1236 Write GridFS integration tests

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• Closed