Fix multinode tempest test failure

Change-Id: Ibb5cbb93d53ff45d66ab4f0c0d4b12e908170d35

watcher_tempest_plugin/tests/scenario/base.py

@@ -36,6 +36,11 @@ CONF = config.CONF
 class BaseInfraOptimScenarioTest(manager.ScenarioTest):
     """Base class for Infrastructure Optimization API tests."""
 
+    # States where the object is waiting for some event to perform a transition
+    IDLE_STATES = ('RECOMMENDED', 'FAILED', 'SUCCEEDED', 'CANCELLED')
+    # States where the object can only be DELETED (end of its life-cycle)
+    FINISHED_STATES = ('FAILED', 'SUCCEEDED', 'CANCELLED', 'SUPERSEDED')
+
     @classmethod
     def setup_credentials(cls):
         cls._check_network_config()
@@ -142,6 +147,11 @@ class BaseInfraOptimScenarioTest(manager.ScenarioTest):
 
         return audit.get('state') == 'SUCCEEDED'
 
+    @classmethod
+    def has_audit_finished(cls, audit_uuid):
+        _, audit = cls.client.show_audit(audit_uuid)
+        return audit.get('state') in cls.FINISHED_STATES
+
     # ### ACTION PLANS ### #
 
     def delete_action_plan(self, action_plan_uuid):