test/TEST-17-UDEV: use default image

No need to build a separate 700MB image to save 3080 bytes in the default image.

test/TEST-17-UDEV/test.sh

@@ -2,7 +2,7 @@
 set -e
 
 TEST_DESCRIPTION="UDEV"
-IMAGE_NAME="udev"
+IMAGE_NAME="default"
 TEST_NO_NSPAWN=1
 
 # shellcheck source=test/test-functions
@@ -10,11 +10,4 @@ TEST_NO_NSPAWN=1
 
 QEMU_TIMEOUT=800
 
-test_append_files() {
-    (
-        instmods dummy
-        generate_module_dependencies
-    )
-}
-
 do_test "$@"

test/test-functions

@@ -863,6 +863,7 @@ install_modules() {
 
     instmods loop
     instmods vfat
+    instmods dummy
 
     if [[ "$LOOKS_LIKE_SUSE" ]]; then
         instmods ext4