Use set_network_resources
Use set_network_resources

Network resources to be provisioned for test credentials can be
defined via the set_network_resources helper.

As part of making test.py a stable interface for tempest plugins,
the network_resources attribute will go away, see change
I4eab8f2a722b47edc20e4aab0ef453bec16842f3.

Change-Id: Ied3324ddd3857a8d2d65924ac1dd79705692ef90

openstack/senlin,stackforge/senlin,stackforge/senlin,openstack/senlin,openstack/senlin