fix (Transformation): get older based on utc

src/DIRAC/TransformationSystem/Service/TransformationManagerHandler.py

@@ -413,7 +413,7 @@ def export_getTasksToSubmit(self, transName, numTasks, site=""):
         submitDict = {}
 
         # Apply a delay to avoid race conditions
-        older = datetime.datetime.now() - datetime.timedelta(seconds=30)
+        older = datetime.datetime.utcnow() - datetime.timedelta(seconds=30)
 
         # Retrieve tasks that are ready for submission
         res = self.transformationDB.getTasksForSubmission(