tests: virstoragetest: Add complementary test case for QED format

We have a test case for QED disk image with autodetection but not with
the format explicitly specified.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

tests/virstoragetest.c

@@ -949,6 +949,9 @@ mymain(void)
         .type = VIR_STORAGE_TYPE_FILE,
         .format = VIR_STORAGE_FILE_RAW,
     };
+    TEST_CHAIN(absqed, VIR_STORAGE_FILE_QED,
+               (&qed, &raw), EXP_PASS,
+               (&qed, &raw), ALLOW_PROBE | EXP_PASS);
     TEST_CHAIN(absqed, VIR_STORAGE_FILE_AUTO,
                (&qed_as_raw), EXP_PASS,
                (&qed, &raw), ALLOW_PROBE | EXP_PASS);