Switch Gear to extension data in tracking algorithm

Control use which by option CEPCSW_USE_GEAR in cmake/CEPCSWOptions.cmake

Detector/DetIdentifier/include/DetIdentifier/CEPCConf.h

@@ -13,12 +13,13 @@ namespace CEPCConf{
     static const int TPC     = 4;
     static const int SET     = 5;
     static const int ETD     = 6;
-    // same position -> same ID, just named as different in different stage
-    static const int ITKBarrel = 2;
-    static const int ITKEndcap = 3;
-    static const int DC        = 4;
-    static const int OTKBarrel = 5;
-    static const int OTKEndcap = 6;
+    static const int DC      = 7;
+    // keep compatibility of tracking algorothm for old detector design,
+    // need to update these options as comprehensive consideration after switching new tracking in good algorithm design
+    static const int ITKBarrel = SIT;
+    static const int ITKEndcap = FTD;
+    static const int OTKBarrel = SET;
+    static const int OTKEndcap = ETD;
     
     static const int ECAL        = 20;
     static const int ECAL_PLUG   = 21;