Add service supervisor

This patch set adds supervisor mechanism for Watcher services
to get ability to track states.

Partially-Implements: blueprint watcher-service-list
Change-Id: Iab1cefb971c79ed27b22b6a5d1bed8698e35f9a4

watcher/common/service_manager.py

@@ -0,0 +1,56 @@
+# -*- encoding: utf-8 -*-
+#
+# Copyright © 2016 Servionica
+##
+# 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 abc
+
+
+class ServiceManagerBase(object):
+
+    @abc.abstractproperty
+    def service_name(self):
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def api_version(self):
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def publisher_id(self):
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def conductor_topic(self):
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def status_topic(self):
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def notification_topics(self):
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def conductor_endpoints(self):
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def status_endpoints(self):
+        raise NotImplementedError()
+
+    @abc.abstractproperty
+    def notification_endpoints(self):
+        raise NotImplementedError()