Create scenario tests for amphora

This patch implements amphora tests for the Octavia
Tempest Plugin.

Change-Id: I779d92b22a23b10d834220d80fe997f5a3719bbd
diff --git a/octavia_tempest_plugin/clients.py b/octavia_tempest_plugin/clients.py
index 14381f2..1a0a894 100644
--- a/octavia_tempest_plugin/clients.py
+++ b/octavia_tempest_plugin/clients.py
@@ -16,6 +16,8 @@
 from tempest import config
 
 from octavia_tempest_plugin.services.load_balancer.v2 import (
+    amphora_client)
+from octavia_tempest_plugin.services.load_balancer.v2 import (
     healthmonitor_client)
 from octavia_tempest_plugin.services.load_balancer.v2 import (
     l7policy_client)
@@ -53,3 +55,5 @@
             self.auth_provider, SERVICE_TYPE, CONF.identity.region)
         self.l7rule_client = l7rule_client.L7RuleClient(
             self.auth_provider, SERVICE_TYPE, CONF.identity.region)
+        self.amphora_client = amphora_client.AmphoraClient(
+            self.auth_provider, SERVICE_TYPE, CONF.identity.region)