fix test test_guest_os due to missing template on xen 8.4

Author: Pearl1594

test/integration/smoke/test_guest_os.py

@@ -181,7 +181,10 @@ def test_guest_OS_mapping_check_with_hypervisor(self):
             raise unittest.SkipTest("OS name check with hypervisor is supported only on XenServer and VMware")
 
         if self.hypervisor.hypervisor.lower() == "xenserver":
-            testosname="Debian Jessie 8.0"
+            if tuple(map(int, self.hypervisor.hypervisorversion.split("."))) >= (8, 4, 0):
+                testosname = "Debian Bookworm 12"
+            else:
+                testosname = "Debian Jessie 8.0"
         else:
             testosname="debian4_64Guest"