do not serialize the workflow when updating the status

src/jflow/workflow.py

@@ -890,8 +890,8 @@ class Workflow(threading.Thread):
         except Exception as e:
             self._log(str(e), traceback=traceback.format_exc(chain=False))
             utils.display_error_message(str(e))
-
-    def _update_status_from_log(self):
+            
+    def get_status(self):
         # first update the status from weaver folders
         # TODO update self.end_time
         try:
@@ -913,10 +913,6 @@ class Workflow(threading.Thread):
             elif self.status != self.STATUS_COMPLETED:
                 self.status = self.STATUS_STARTED
         except: pass
-        self._serialize()
-
-    def get_status(self):
-        self._update_status_from_log()
         return self.status
     
     def get_resource(self, resource):