Update unit test to know about image.type
Update unit test to know about image.type

image.type is a new field added to the test_suite document

Signed-off-by: Ana Guerrero Lopez <b6edd3e5043d0ec8ce1663b61a47bb9c3fdab4d0@collabora.com>

kernelci/kernelci-backend,kernelci/kernelci-backend