[bind10-dev] python files below src/bin

[zhanglikun]

> The part of b10-cfgmgr that actually contains all the code lives under
> src/lib/python/isc/config, and while that's technically not the best
> place to put it, at least it gets installed.
> 
> Should we move all .py files that support the python tools under lib? Or
> should we keep them under bin/? And where should we install them then?
> 
> Jelte

I ask the same question again, since I planed to do as the way of cfgmgr. 

Zhanglikun