deprecate use of tenant in configs

OpenStack has settled (a very long time ago) on project to represent
the container which has users. We should make tempest configs always
use project versions of these names. This deprecates the old tenant
versions of these names, and makes project version the prefered
option.

Change-Id: Ied68c0326cf891a4e6eb3db51dc5f43241e4b8d2
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index 11f7fc6..3654b2e 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -41,9 +41,9 @@
     @classmethod
     def resource_setup(cls):
         super(RoutersTest, cls).resource_setup()
-        cls.tenant_cidr = (CONF.network.tenant_network_cidr
+        cls.tenant_cidr = (CONF.network.project_network_cidr
                            if cls._ip_version == 4 else
-                           CONF.network.tenant_network_v6_cidr)
+                           CONF.network.project_network_v6_cidr)
 
     @test.attr(type='smoke')
     @test.idempotent_id('f64403e2-8483-4b34-8ccd-b09a87bcc68c')
@@ -274,7 +274,7 @@
     @test.requires_ext(extension='extraroute', service='network')
     def test_update_delete_extra_route(self):
         # Create different cidr for each subnet to avoid cidr duplicate
-        # The cidr starts from tenant_cidr
+        # The cidr starts from project_cidr
         next_cidr = netaddr.IPNetwork(self.tenant_cidr)
         # Prepare to build several routes
         test_routes = []