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/api/test_revisions.py b/neutron_tempest_plugin/api/test_revisions.py
index 0d590f6..09bb3f1 100644
--- a/neutron_tempest_plugin/api/test_revisions.py
+++ b/neutron_tempest_plugin/api/test_revisions.py
@@ -344,7 +344,7 @@
     def test_update_router_extra_attributes_bumps_revision(self):
         # updates from CVR to CVR-HA are supported on every release,
         # but only the admin can forcibly create a non-HA router
-        router_args = {'tenant_id': self.client.tenant_id,
+        router_args = {'tenant_id': self.client.project_id,
                        'ha': False}
         router = self.admin_client.create_router('r1', True,
             **router_args)['router']