fix multinode tempest test failure

fix all five tempest tests:
watcher_tempest_plugin.tests.api.admin.test_service.
TestShowListService.test_show_service

watcher_tempest_plugin.tests.api.admin.test_service.
TestShowListService.test_show_service_with_links

tearDownClass (watcher_tempest_plugin.tests.api.admin.
test_action_plan.TestCreateDeleteExecuteActionPlan)

watcher_tempest_plugin.tests.scenario.test_execute_basic_optim
.TestExecuteBasicStrategy.test_execute_basic_action_plan

watcher_tempest_plugin.tests.scenario.test_execute_workload_balancing
.TestExecuteWorkloadBalancingStrategy
.test_execute_workload_stabilization

Change-Id: I4d8945cf2dedea3fa32029d6c07d24a411c1f2e4
Closes-Bug: #1695225

watcher_tempest_plugin/tests/api/admin/base.py

@@ -81,12 +81,16 @@ class BaseInfraOptimTest(test.BaseTestCase):
                     ap['uuid'] for ap in action_plans['action_plans'])
 
                 for action_plan in action_plans['action_plans']:
-                    test_utils.call_until_true(
-                        func=functools.partial(
-                            cls.is_action_plan_idle, action_plan['uuid']),
-                        duration=30,
-                        sleep_for=.5
-                    )
+                    try:
+                        test_utils.call_until_true(
+                            func=functools.partial(
+                                cls.is_action_plan_idle, action_plan['uuid']),
+                            duration=30,
+                            sleep_for=.5
+                        )
+                    except Exception:
+                        action_plans_to_be_deleted.remove(
+                            action_plan['uuid'])
 
             # Phase 2: Delete them all
             for action_plan_uuid in action_plans_to_be_deleted: