Broken unittests

[Halla Rempt]

Updated list of failures:

The following tests FAILED:
          1 - appstreamtest (Failed)
         48 - libs-flake-TestSvgParser (Failed)
         49 - libs-flake-TestSvgParserCloned (Failed)
         50 - libs-flake-TestSvgParserRoundTrip (Subprocess aborted)
        165 - libs-image-kis_onion_skin_compositor_test (Failed)
        167 - libs-image-kis_image_animation_interface_test (Failed)
        229 - libs-ui-kis_shape_controller_test (Subprocess aborted)
        265 - plugins-dockers-animation-timeline_model_test (Failed)
        273 - plugins-impex-kis_kra_saver_test (Failed)
        291 - plugins-impex-KisHeifTest (Failed)