Context timeout not handled in FGetObject

[alexcocia]

When setting a context timeout of x duration, the request made to FGetObject always lasts 30 secs. Context is not returned until that time is passed

The following code returns the error after 30 secs:

        scalityContext, cancel := context.WithTimeout(context.Background(), 5 * time.Second)
	defer cancel()

	err := scality.client.FGetObject(scalityContext, bucket, itemName, filePath, minio.GetObjectOptions{})
	if err != nil {
		return errorhandler.CreateInternalError(fmt.Sprintf("Error in Scality getting item: [%s] bucket: [%s]", itemName, bucket), err)
	}

[harshavardhana]

fixed by #1414