Code enhancement of DeepRec (#5468)
Code enhancement of DeepRec (#5468)

* fix file size

* change repartition

* minor

* update repartition

* style
yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL