Increase the timeout for the stop_stack message

Previously, the stop_stack message accidentally used the
engine_life_check_timeout (by default, 2s). But unlike other messages sent
using that timeout, stop_stack needs to synchronously kill all running
threads operating on the stack. For a very large stack, this can easily
take much longer than a couple of seconds. This patch increases the timeout
to give a better chance of being able to start the delete.

Change-Id: I4b36ed7f1025b6439aeab63d71041bb2000363a0
Closes-Bug: #1499669

functional/test_delete.py

@@ -0,0 +1,42 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import time
+
+from heat_integrationtests.functional import functional_base
+
+
+class DeleteInProgressTest(functional_base.FunctionalTestsBase):
+
+    root_template = '''
+heat_template_version: 2013-05-23
+resources:
+    rg:
+        type: OS::Heat::ResourceGroup
+        properties:
+            count: 125
+            resource_def:
+                type: empty.yaml
+'''
+
+    empty_template = '''
+heat_template_version: 2013-05-23
+resources:
+'''
+
+    def test_delete_nested_stacks_create_in_progress(self):
+        files = {'empty.yaml': self.empty_template}
+        identifier = self.stack_create(template=self.root_template,
+                                       files=files,
+                                       expected_status='CREATE_IN_PROGRESS')
+        time.sleep(20)
+        self._stack_delete(identifier)