set spark master in run-with-pip example (#1797)
set spark master in run-with-pip example (#1797)


i8run/BigDL-1,jenniew/BigDL,luchy0120/BigDL,wzhongyuan/BigDL,qiuxin2012/BigDL,wzhongyuan/BigDL,zhangxiaoli73/BigDL,i8run/BigDL-1,yiheng/BigDL,zhangxiaoli73/BigDL,yiheng/BigDL,jenniew/BigDL,wzhongyuan/BigDL,yiheng/BigDL,qiuxin2012/BigDL,luchy0120/BigDL,qiuxin2012/BigDL,jenniew/BigDL,luchy0120/BigDL,i8run/BigDL-1,zhangxiaoli73/BigDL