Removes replace-on-update for SwiftSignalHandle resource

Rebuilding the resource on every stack update results in a new
url being generated. This causes any depending resources to
be rebuilt, even when there are no changes in the template.

Change-Id: Id385e0e8f9f68900b76a596a05ac99baceb831cc
Closes-Bug: #1473692
diff --git a/functional/test_swiftsignal_update.py b/functional/test_swiftsignal_update.py
new file mode 100644
index 0000000..0f1c43c
--- /dev/null
+++ b/functional/test_swiftsignal_update.py
@@ -0,0 +1,48 @@
+#    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.
+
+
+from heat_integrationtests.common import test
+
+test_template = '''
+heat_template_version: 2014-10-16
+
+resources:
+  signal_handle:
+    type: "OS::Heat::SwiftSignalHandle"
+
+outputs:
+  signal_curl:
+    value: { get_attr: ['signal_handle', 'curl_cli'] }
+    description: Swift signal cURL
+
+  signal_url:
+    value: { get_attr: ['signal_handle', 'endpoint'] }
+    description: Swift signal URL
+'''
+
+
+class SwiftSignalHandleUpdateTest(test.HeatIntegrationTest):
+
+    def setUp(self):
+        super(SwiftSignalHandleUpdateTest, self).setUp()
+        self.client = self.orchestration_client
+
+    def test_stack_update_same_template_replace_no_url(self):
+        stack_identifier = self.stack_create(template=test_template)
+        stack = self.client.stacks.get(stack_identifier)
+        orig_url = self._stack_output(stack, 'signal_url')
+        orig_curl = self._stack_output(stack, 'signal_curl')
+        self.update_stack(stack_identifier, test_template)
+        stack = self.client.stacks.get(stack_identifier)
+        self.assertEqual(orig_url, self._stack_output(stack, 'signal_url'))
+        self.assertEqual(orig_curl, self._stack_output(stack, 'signal_curl'))