Update the repository URL in setup.py
Update the repository URL in setup.py

Because the project moved to a new repository, point the repository
URL in setup.py to the new one.

Change-Id: I114eeebdf9a7beb19650a8f3f5c227acf6e4ab8c

midonet/python-midonetclient,midonet/python-midonetclient