Replace deprecated tenant_id property

The tenant_id property of RestClient in tempest was deprecated in
25.0.0. This replaces the deprecated property by the new project_id
property to avoid the following warning.

WARNING tempest.lib.common.rest_client [-] Deprecated: "tenant_id"
property is deprecated for removal, use "project_id" instead

Depends-on: https://review.opendev.org/c/openstack/tempest/+/707938
Change-Id: Ie3c32f9f2278b78603a4214c5717df8691ba490a
diff --git a/neutron_tempest_plugin/scenario/test_connectivity.py b/neutron_tempest_plugin/scenario/test_connectivity.py
index ca7d755..5608dae 100644
--- a/neutron_tempest_plugin/scenario/test_connectivity.py
+++ b/neutron_tempest_plugin/scenario/test_connectivity.py
@@ -211,7 +211,7 @@
             network, cidr=str(subnet_cidr), gateway=str(gw_ip))
 
         non_dvr_router = self.create_router_by_client(
-            tenant_id=self.client.tenant_id,
+            tenant_id=self.client.project_id,
             is_admin=True,
             router_name=data_utils.rand_name("nondvr-2-routers-same-network"),
             admin_state_up=True,
@@ -219,7 +219,7 @@
         self.create_router_interface(non_dvr_router['id'], subnet['id'])
 
         dvr_router = self.create_router_by_client(
-            tenant_id=self.client.tenant_id,
+            tenant_id=self.client.project_id,
             is_admin=True,
             router_name=data_utils.rand_name("dvr-2-rotuers-same-network"),
             admin_state_up=True,