Rename command to audit

This patchset is there to change the code structure.

Some Python class and packages need to be renamed
for a better compliance with the shared terminology
which provides a better understanding of Watcher
objects and components by every contributor.

This patchset is there to rename the folder command to audit

Partially implements: blueprint glossary-related-refactoring

Change-Id: I76616fb58d5e79a7dc209b80e882d216850d18a4

watcher/decision_engine/messaging/audit_endpoint.py

@@ -18,7 +18,7 @@
 #
 from oslo_log import log
 
-from watcher.decision_engine.command.audit import TriggerAuditCommand
+from watcher.decision_engine.audit.default import DefaultAuditHandler
 from watcher.metrics_engine.cluster_model_collector.manager import \
     CollectorManager
 
@@ -33,7 +33,7 @@ class AuditEndpoint(object):
     def do_trigger_audit(self, context, audit_uuid):
         model_collector = self.manager.get_cluster_model_collector()
 
-        audit = TriggerAuditCommand(self.de, model_collector)
+        audit = DefaultAuditHandler(self.de, model_collector)
         audit.execute(audit_uuid, context)
 
     def trigger_audit(self, context, audit_uuid):

watcher/decision_engine/messaging/command/base.py

@@ -1,27 +0,0 @@
-# -*- encoding: utf-8 -*-
-# Copyright (c) 2015 b<>com
-#
-# Authors: Jean-Emile DARTOIS <jean-emile.dartois@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.
-#
-import abc
-import six
-
-
-@six.add_metaclass(abc.ABCMeta)
-class BaseDecisionEngineCommand(object):
-    @abc.abstractmethod
-    def execute(self):
-        raise NotImplementedError()