Delete qos policies created during scenario tests

Change-Id: I3d41ab713eccac434e44d9c117a9846ba7ab5ed6
diff --git a/neutron_tempest_plugin/scenario/test_floatingip.py b/neutron_tempest_plugin/scenario/test_floatingip.py
index bf890ad..9c75f79 100644
--- a/neutron_tempest_plugin/scenario/test_floatingip.py
+++ b/neutron_tempest_plugin/scenario/test_floatingip.py
@@ -341,6 +341,11 @@
     def resource_setup(cls):
         super(FloatingIPQosTest, cls).resource_setup()
 
+    @classmethod
+    def setup_clients(cls):
+        super(FloatingIPQosTest, cls).setup_clients()
+        cls.admin_client = cls.os_admin.network_client
+
     @decorators.idempotent_id('5eb48aea-eaba-4c20-8a6f-7740070a0aa3')
     def test_qos(self):
         """Test floating IP is binding to a QoS policy with