function addHeaderParameter(oUploadCollectionParameter) {
			var oRequestHeaders = {
				name: oUploadCollectionParameter.getName(),
				value: oUploadCollectionParameter.getValue()
			};
			event.getParameter("requestHeaders").push(oRequestHeaders);
		}
Creates the unique key for a file by concatenating the fileName with its requestId and puts it into the requestHeaders parameter of the FileUploader.
It triggers the beforeUploadStarts event for applications to add the header parameters for each file.
@param {jQuery.Event} event The jQuery Event object
@private