change to adopt singleton patter on otscontrol.

OTSSysMgrApp/ControllerSettingForm.cs

@@ -60,7 +60,7 @@ namespace OTSSysMgrApp
             //控制类对象初始化
             if (cfun == null)
             {
-                cfun = new COTSControlFunExport();
+                cfun =  COTSControlFunExport.GetControllerInstance();
             }
             lan = new OTSSysMgrTools.Language(this);
             table = lan.GetNameTable(this.Name);

OTSSysMgrApp/SemTestForms.cs

@@ -43,7 +43,7 @@ namespace OTSSysMgrApp
             //控制类对象初始化
             if (cfun == null)
             {
-                cfun = new COTSControlFunExport();
+                cfun =  COTSControlFunExport.GetControllerInstance();
             }
             //初始化其他参数
             Init();