修复Call命令计时问题

UTS_Core/UTSModule/Test/UtsTester.vb

@@ -720,8 +720,7 @@ Namespace UTSModule.Test
             Dim result As New TestCommandReturn
             If String.IsNullOrWhiteSpace(node.Command) Then Return result
 
-            _stepWatch.Restart() '重启单步测试计时
-
+            Dim watch As Stopwatch = Stopwatch.StartNew() '开启单步计时
             Dim cmd As New TestCommand(node) '获取执行参数
             ReplaceValue(cmd, localVariable)  '执行前变量替换
             Dim executor As TestCommandExecutor = TestCommandManger.CreateExecutor(cmd) '创建执行器
@@ -742,8 +741,8 @@ Namespace UTSModule.Test
                 Thread.Sleep(node.RetryInterval)
             Next
 
-            _stepWatch.Stop()
-            result.StepTimeSpan = _stepWatch.Elapsed
+            watch.Stop()
+            result.StepTimeSpan = watch.Elapsed
 
             '进度修改
             If node.RowListIndex > _startTestIndex AndAlso node.RowIndex < _endTestIndex Then