COMPMID-417 Allow the tests to run even when assets are not present

Change-Id: Ief165b1d583a70cbe35aae93f05ddfe962196323
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/89503
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
8 files changed