Deprecate sdntest.sh or not?

[fno2010]

Docker python APIs can get and maintain the docker images and containers easily. In the current implementation, the python version script (bin/sdntest) has been ahead of the bash version (bin/sdntest.sh).

Maybe we can deprecate the bash version script. The only consideration is that some minimal working environment (like CoreOS) may not have python runtime.

Any thoughts?