Restict usage *args for novaclient.client.Client

Possitional arguments doen't allow to provide proper compatibility
and deprecation workflows. *args was deprecated long time ago and a
proper message was added.

Change-Id: Ib4a8f4db52a0f4cb8e8cf5e8c8e778eef8831e91

novaclient/client.py

@@ -808,7 +808,7 @@ def get_client_class(version):
 
 
 def Client(version, username=None, api_key=None, project_id=None,
-           auth_url=None, *args, **kwargs):
+           auth_url=None, **kwargs):
     """Initialize client object based on given version.
 
     HOW-TO:
@@ -829,15 +829,9 @@ def Client(version, username=None, api_key=None, project_id=None,
     session API. See "The novaclient Python API" page at
     python-novaclient's doc.
     """
-    if args:
-        warnings.warn("Only VERSION, USERNAME, PASSWORD, PROJECT_ID and "
-                      "AUTH_URL arguments can be specified as positional "
-                      "arguments. All other variables should be keyword "
-                      "arguments. Note that this will become an error in "
-                      "Ocata.")
     api_version, client_class = _get_client_class_and_version(version)
     kwargs.pop("direct_use", None)
     return client_class(username=username, api_key=api_key,
                         project_id=project_id, auth_url=auth_url,
                         api_version=api_version, direct_use=False,
-                        *args, **kwargs)
+                        **kwargs)

releasenotes/notes/restrict-args-for-novaclient-ep-491098c3634365be.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - novaclient.client.Client entry-point accepts only 5 positional arguments(
+    version, username, api_key, project_id, auth_url). Using positional
+    arguments for all other options become an error.