Remove unuseful test data in test_netwrok.py
Remove unuseful test data in test_netwrok.py

Change-Id: Ibd4f8bb602acdcc3421205d9dafc8dcafb9645df
Implements: blueprint osc-network-unit-test-refactor
Related-to: blueprint neutron-client

openstack/python-openstackclient,dtroyer/python-openstackclient,dtroyer/python-openstackclient,openstack/python-openstackclient,redhat-openstack/python-openstackclient,redhat-openstack/python-openstackclient