Fixes outdated CONF setting in test_networks_rbac.

Currently, test_networks_rbac test file uses
CONF.network.tenant_network_cidr which is not valid; it should be
CONF.network.project_network_cidr, according to:
http://docs.openstack.org/developer/tempest/sampleconf.html

Also fixed a syntax error in a test file.

Change-Id: I4e594334c390e9804df4c69e9b1d8cfb476d42c9
1 file changed