backporting  json-config-parser support python2

Hi!ben,
    I'm happy to tell you that today i finish the back-porting.
I find the Py2ChainMap (https://github.com/justanr/Py2ChainMap), which is perfectly fit our needs.
people want to use json-config-parser in python2(i just test python2.7) should replace /backport/collections.py to their local python's collections.py which default in /python/home/Libs.
also i remove the "*" which i think is only be use in python3.