Deprecated TFNet training (#2100)
Deprecated TFNet training (#2100)

* deprecated tfnet training

* remote example tests
intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL