message: Fix StartCopyBlobOperation by removing the field - derived classes should not define a member with the same type and name as the base class
  Remove the raw response from Operation-derived class
diff: @@ -114,7 +114,6 @@ namespace Azure { namespace Storage { namespace Blobs {
  std::chrono::milliseconds period,
  Azure::Core::Context& context) override;
  - std::unique_ptr<Azure::Core::Http::RawResponse> m_rawResponse;
  std::shared_ptr<BlobClient> m_blobClient;
  Models::GetBlobPropertiesResult m_pollResult;
  