Load torch model from java value (#3630)
Load torch model from java value (#3630)

* some date

* some change

* clean up

* add some comments

* fix style check

* fix style check

* some update

* some update

* some update

* some update

* some update

* some update

* some update
yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL