message: also swallow exception when container doesn't exist for DeleteIfExists
diff: @@ -631,7 +631,8 @@ namespace Azure { namespace Storage { namespace Blobs {
  }
  catch (StorageException& e)
  {
  - if (e.StatusCode == Core::Http::HttpStatusCode::NotFound && e.ErrorCode == "BlobNotFound")
  + if (e.StatusCode == Core::Http::HttpStatusCode::NotFound
  + && (e.ErrorCode == "BlobNotFound" || e.ErrorCode == "ContainerNotFound"))
  {
  return Azure::Core::Response<Models::DeleteBlobResult>(std::move(e.RawResponse));
  }
  