Fix attributes ordering at v3/client.py
Fix attributes ordering at v3/client.py

Fix attributes alphabetical ordering at
v3/client.py.

Change-Id: I1ca71a56a6a710b231a8ed770835d45d3cf01cda

jamielennox/python-keystoneclient,klmitch/python-keystoneclient,alexpilotti/python-keystoneclient,ging/python-keystoneclient,darren-wang/ksc,sdpp/python-keystoneclient,Mercador/python-keystoneclient,magic0704/python-keystoneclient,alexpilotti/python-keystoneclient,Mercador/python-keystoneclient,ging/python-keystoneclient,jamielennox/python-keystoneclient,magic0704/python-keystoneclient,darren-wang/ksc,klmitch/python-keystoneclient,jamielennox/python-keystoneclient,sdpp/python-keystoneclient