Fix #4963, change log level from debug to info (#4969)
Fix #4963, change log level from debug to info (#4969)

* Fix #4963 fix the log level error
* Add route AppenderRef
yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL