Move object storage container_client to lib interface

object storage container_client is stable now and good to be moved
as stable library interface.

Unit tests will be next step for those clients which should
be ok after miving to lib.

Partially implements blueprint consistent-service-method-names

Change-Id: I74c6d62058e0dcf9284f313c6f45d83c20597fc4
diff --git a/releasenotes/notes/make-account-client-as-stable-interface-d1b07c7e8f17bef6.yaml b/releasenotes/notes/make-account-client-as-stable-interface-d1b07c7e8f17bef6.yaml
index 9d5a1f5..5f899cf 100644
--- a/releasenotes/notes/make-account-client-as-stable-interface-d1b07c7e8f17bef6.yaml
+++ b/releasenotes/notes/make-account-client-as-stable-interface-d1b07c7e8f17bef6.yaml
@@ -7,3 +7,4 @@
     without any maintenance changes.
 
       * account_client
+      * container_client
diff --git a/tempest/services/object_storage/container_client.py b/tempest/lib/services/object_storage/container_client.py
similarity index 100%
rename from tempest/services/object_storage/container_client.py
rename to tempest/lib/services/object_storage/container_client.py
diff --git a/tempest/services/object_storage/__init__.py b/tempest/services/object_storage/__init__.py
index 771ed8f..166e475 100644
--- a/tempest/services/object_storage/__init__.py
+++ b/tempest/services/object_storage/__init__.py
@@ -17,7 +17,8 @@
     BulkMiddlewareClient
 from tempest.lib.services.object_storage.capabilities_client import \
     CapabilitiesClient
-from tempest.services.object_storage.container_client import ContainerClient
+from tempest.lib.services.object_storage.container_client import \
+    ContainerClient
 from tempest.services.object_storage.object_client import ObjectClient
 
 __all__ = ['AccountClient', 'BulkMiddlewareClient', 'CapabilitiesClient',