qemu.tests.cfg.cdrom_test: Add lock check case when media is not present

changes from v1:
  - Disable this case for RHEL 5 host
Signed-off-by: NYiqiao Pu <ypu@redhat.com>
Signed-off-by: NQingtang Zhou <qzhou@redhat.com>

qemu/tests/cfg/cdrom_test.cfg

@@ -23,6 +23,12 @@
             cdrom_test_locked = yes
             Host_RHEL.5:
                 cdrom_test_locked = no
+        - cdrom_not_insert:
+            no Host_RHEL.5
+            cdroms = cd1
+            cdrom_cd1 = ""
+            not_insert_at_start = yes
+            cdrom_without_file = yes
         - guest_s3:
             cdrom_test_locked = no
             sub_test = guest_suspend