reduce example test time (#922)
reduce example test time (#922)

* reduce example test time

* fix num

* reduce nnframes time

* reset pip changes

* reduce text classification time

* change to ftp

* change example test

yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,intel-analytics/BigDL