qemu/tests/cfg: Add new scenario for multi_host

Do nic driver unload/load for migration.
Signed-off-by: NShuping Cui <scui@redhat.com>

qemu/tests/cfg/multi_host.cfg

@@ -332,6 +332,31 @@
                             attempts = 100
                             attempts_timeout = 1
 
+                - with_module_reload:
+                    type = migration_multi_host_with_stress
+                    preprocess_env = yes
+                    #serial_login = yes
+                    #not_login_after_mig = yes
+                    bg_stress_test = driver_load
+                    repeats = 20
+                    nics += " nic2"
+                    virtio_net:
+                        module_name = virtio_net
+                        nic_model_nic2 = e1000
+                    e1000:
+                        module_name = e1000
+                        nic_model_nic2 = virtio_net
+                    rtl8139:
+                        module_name = 8139cp
+                        nic_model_nic2 = virtio_net
+                    driver_id_pattern = ${module_name}
+                    driver_id_cmd = lsmod | grep ${module_name}
+                    driver_load_cmd = modprobe ${module_name}
+                    driver_unload_cmd = modprobe -r ${module_name}
+                    test_after_load = file_transfer
+                    filesize = 100
+                    transfer_timeout = 1000
+
         - cpuflags_multi_host:
             not_preprocess_host1 = yes
             variants: