Service client modules in object-storage __init__

Import the object-storage service client classes in the __init__ of the
object-storage module, and define __all__, so that service client classes
may be accessed by importing the object-storage module only.

Change-Id: Ie0d13548d12e0ace4bb611470849d7ddcb23cbcb
Partially-implements: bp client-manager-refactor
diff --git a/tempest/clients.py b/tempest/clients.py
index a5a3b19..2398d3e 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -35,9 +35,7 @@
     DatabaseVersionsClient
 from tempest.services import identity
 from tempest.services import image
-from tempest.services.object_storage.account_client import AccountClient
-from tempest.services.object_storage.container_client import ContainerClient
-from tempest.services.object_storage.object_client import ObjectClient
+from tempest.services import object_storage
 from tempest.services.orchestration.json.orchestration_client import \
     OrchestrationClient
 from tempest.services import volume
@@ -413,6 +411,9 @@
         }
         params.update(self.default_params_with_timeout_values)
 
-        self.account_client = AccountClient(self.auth_provider, **params)
-        self.container_client = ContainerClient(self.auth_provider, **params)
-        self.object_client = ObjectClient(self.auth_provider, **params)
+        self.account_client = object_storage.AccountClient(self.auth_provider,
+                                                           **params)
+        self.container_client = object_storage.ContainerClient(
+            self.auth_provider, **params)
+        self.object_client = object_storage.ObjectClient(self.auth_provider,
+                                                         **params)
diff --git a/tempest/services/object_storage/__init__.py b/tempest/services/object_storage/__init__.py
index e69de29..96fe4a3 100644
--- a/tempest/services/object_storage/__init__.py
+++ b/tempest/services/object_storage/__init__.py
@@ -0,0 +1,19 @@
+# Copyright (c) 2016 Hewlett-Packard Enterprise Development Company, L.P.
+#
+# 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 tempest.services.object_storage.account_client import AccountClient
+from tempest.services.object_storage.container_client import ContainerClient
+from tempest.services.object_storage.object_client import ObjectClient
+
+__all__ = ['AccountClient', 'ContainerClient', 'ObjectClient']