Remove references to "tenant_id" in test_qos

Change-Id: I188bb04992b8fa306cd0da6f9ebed4c1cd2338c9
Related-Bug: #1858783
diff --git a/neutron_tempest_plugin/api/base.py b/neutron_tempest_plugin/api/base.py
index 0891bb6..f8cb339 100644
--- a/neutron_tempest_plugin/api/base.py
+++ b/neutron_tempest_plugin/api/base.py
@@ -733,10 +733,10 @@
 
     @classmethod
     def create_qos_policy(cls, name, description=None, shared=False,
-                          tenant_id=None, is_default=False):
+                          project_id=None, is_default=False):
         """Wrapper utility that returns a test QoS policy."""
         body = cls.admin_client.create_qos_policy(
-            name, description, shared, tenant_id, is_default)
+            name, description, shared, project_id, is_default)
         qos_policy = body['policy']
         cls.qos_policies.append(qos_policy)
         return qos_policy