Fix _ce.py

fluid/ocr_recognition/_ce.py

@@ -47,6 +47,7 @@ def log_to_ce(log):
         kpi_tracker[kpi.name] = kpi
 
     for (kpi_name, kpi_value) in parse_log(log):
+        if kpi_name in kpi_tracker:
             print(kpi_name, kpi_value)
             kpi_tracker[kpi_name].add_record(kpi_value)
             kpi_tracker[kpi_name].persist()