Use CUDA 10.1 for Linux build
(Windows change is already in)
Please note, cublas 10.2.1.243 is for CUDA SDK 10.1.243, not CUDA 10.2.x. CUDA 10.2.89 need cublas 10.2.2.89. They match on the last part of the digits.
libcublas10-10.1.0.105 won't work!!!
The cuda docker image by viswamy is already using 10.1, no need to change.
* Upgrade gpu build to CUDA 10 + cudnn 7.3
* update the yaml file for python package building
* switch to the cuda9.1 docker file if the CUDA_VER is cuda9.1-cudnn7.1
