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
The reason I need the IP field overload is that current sofwatre my consumer uses picks the id field and hence the original reason.

That said, I shall also add another field pd['label']