We need the test labels to be reflected in the page id of the exported H...

Currently the "id" field on exported HARs does not contain the test labels which were assigned during test creation. This patch propagates the label value to the exported HAR so that we know which HAR is which
You shouldn't pass the label through the API, export.php should just pull the label directly.  If there is a reason that it needs to be passed then it also needs to be url-encoded.