Merge pull request #1457 from XueqiangWei/data_plane-block_scsi

block_hotplug.data_plane: add iothread to existing virtio-scsi-pci

qemu/tests/cfg/block_hotplug.cfg

@@ -133,12 +133,11 @@
         - @default:
         - data_plane:
             no Host_RHEL.m6
-            only with_plug.with_system_reset.one_pci
-            one_pci:
-                repeat_times = 1
+            only with_plug.with_system_reset.one_pci, block_scsi..with_plug.with_repetition.one_pci
             iothreads = iothread0
             block_virtio:
                 blk_extra_params_stg0 = "iothread=${iothreads}"
             block_scsi:
                 no Host_RHEL.m7.u0, Host_RHEL.m7.u1, Host_RHEL.m7.u2
+                bus_extra_params_image1 = "iothread=${iothreads}"
                 bus_extra_params_stg0 = "iothread=${iothreads}"