test/vhost: Fix. vm_run takes vm numbers as separate arguments.

In patch fdc82d3 'vm_run $@' was changed to 'vm_run "$@"' but
arguments like 'vm_run "0 1"' should be passed as
'vm_run 0 1'.

Change-Id: I2a51a31fc0b0b55079963b11587be55d9bf86a87
Signed-off-by: Pawel Kaminski <pawelx.kaminski@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/476087
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

test/vhost/hotplug/common.sh

@@ -105,13 +105,15 @@ function vms_setup() {
 }
 
 function vm_run_with_arg() {
-    vm_run "$@"
-    vm_wait_for_boot 300 "$@"
+    local vms_to_run="$*"
+    vm_run $vms_to_run
+    vm_wait_for_boot 300 $vms_to_run
 }
 
 function vms_setup_and_run() {
+    local vms_to_run="$*"
     vms_setup
-    vm_run_with_arg "$@"
+    vm_run_with_arg $vms_to_run
 }
 
 function vms_prepare() {