Notification and CDM partial update

In this changeset, I implemented the notification handling (Rx only)
system for consuming incoming notifications, more especially the Nova
ones. The notifications handlers also contain the logic which
incrementally updates the Compute model.

Change-Id: Ia036a5a2be6caa64b7f180de38821b57c624300c
Partially-implements: blueprint cluster-model-objects-wrapper

watcher/tests/decision_engine/model/notification/fake_managers.py

@@ -0,0 +1,53 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2016 b<>com
+#
+# Authors: Vincent FRANCOISE <vincent.francoise@b-com.com>
+#
+# 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 watcher.decision_engine.model.notification import nova as novanotification
+from watcher.tests.decision_engine.strategy.strategies \
+    import faker_cluster_state
+
+
+class FakeManager(object):
+
+    API_VERSION = '1.0'
+
+    def __init__(self):
+        self.api_version = self.API_VERSION
+
+        # fake cluster instead on Nova CDM
+        self.fake_cdmc = faker_cluster_state.FakerModelCollector()
+
+        self.publisher_id = 'test_publisher_id'
+        self.conductor_topic = 'test_conductor_topic'
+        self.status_topic = 'test_status_topic'
+        self.notification_topics = ['nova']
+
+        self.conductor_endpoints = []  # Disable audit endpoint
+        self.status_endpoints = []
+
+        self.notification_endpoints = [
+            novanotification.ServiceUpdated(self.fake_cdmc),
+
+            novanotification.InstanceCreated(self.fake_cdmc),
+            novanotification.InstanceUpdated(self.fake_cdmc),
+            novanotification.InstanceDeletedEnd(self.fake_cdmc),
+
+            novanotification.LegacyInstanceCreatedEnd(self.fake_cdmc),
+            novanotification.LegacyInstanceUpdated(self.fake_cdmc),
+            novanotification.LegacyLiveMigratedEnd(self.fake_cdmc),
+            novanotification.LegacyInstanceDeletedEnd(self.fake_cdmc),
+        ]