Merge pull request #2148 from qingwangrh/1814176_add_trim_test_on_scsi

Add trim test on virtio_scsi

qemu/tests/cfg/trim_support_test.cfg

 - trim_support_test:
     virt_test_type = qemu libvirt
     only Windows
-    only virtio_blk
+    only virtio_blk,virtio_scsi
     only product_av
     no Win2008 Win7
     type = trim_support_test
@@ -15,7 +15,8 @@
     image_readonly_stg1 = no
     drive_index_stg1 = 3
     image_boot_stg1 = no
-    blk_extra_params_stg1 = "discard=on"
+    virtio_blk:
+        blk_extra_params_stg1 = "discard=on"
     drv_extra_params_stg1 = "discard=unmap"
     host_check_cmd = "du --block-size=1 %s/${stg_name}.qcow2"
     guest_trim_cmd = "defrag.exe %s: /l /u /v"