in an effort to start consuming keystoneauth1, we can move our
sesssion and fixture code over to use keystoneauth1 instead of
keystoneclient.
Change-Id: Ibcbd588ce2e3d864f87ff1eb6e1c3c071a1e06f6
api.network.APIv2 starts with network_list() support to flush out
the skeleton of the Network API.
list_dhcp_agent() supports the --dhcp option of 'network list'
Change-Id: I9a2b90cde84eced1f2ea6a014b769e2bae668211