This method is intended to be used to get response headers and its values from Amazon after an upload in order to verify the successful upload of the files.
Map<String,String> getAmazonHeaders(String item)
item: File location/key of uploaded file.
Return Value: The method will return the map of response headers and its values (e.g. ETag)
Map<String,String> headResponse = cg.SDriveTools.getAmazonHeaders(uploadRequestInfos .fileLocation);