Remove handler on Init

* avoid double handlers

DG_PY_FOFBTool.py

@@ -215,9 +215,9 @@ class DG_PY_FOFBTool(Device):
         self._logs =  ['',]*1024
 
         logger = logging.getLogger("FofbTool")
-        la = ds_logappender(self)
-        la.setFormatter(logging.Formatter("{asctime} {levelname:8}: {message}", style='{'))
-        logger.addHandler(la)
+        self.loghandler = ds_logappender(self)
+        self.loghandler.setFormatter(logging.Formatter("{asctime} {levelname:8}: {message}", style='{'))
+        logger.addHandler(self.loghandler)
         logger.setLevel(getattr(logging, self.loglevel.upper()))
 
         if not hasattr(self, "_include_lbp"):
@@ -244,7 +244,7 @@ class DG_PY_FOFBTool(Device):
         #----- PROTECTED REGION ID(DG_PY_FOFBTool.delete_device) ENABLED START -----#
 
         logger = logging.getLogger("FofbTool")
-        logger.removeHandler(self.filehandler)
+        logger.removeHandler(self.loghandler)
 
         #----- PROTECTED REGION END -----#	//	DG_PY_FOFBTool.delete_device
     # ------------------