tests/integration: adds image_filename in the test generation macro
tests/integration: adds image_filename in the test generation macro

cfoch/gst-editing-services,pitivi/gst-editing-services,pitivi/gst-editing-services,cfoch/ges,cfoch/ges,pitivi/gst-editing-services,pitivi/gst-editing-services,cfoch/gst-editing-services,cfoch/ges,cfoch/gst-editing-services,cfoch/gst-editing-services,cfoch/ges