Rename 'nova.common.config' module to 'nova.middleware'

There was only one sub-module in 'nova.common' but its presence
interferes with tab complete for the majority of people that want
'nova/compute'. Just move that sub-module to its own top-level module
and be done.

Change-Id: Iee886d915577f347e1ee4f54133ae0f87ae75841
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

nova/config.py

@@ -18,9 +18,9 @@
 from oslo_log import log
 from oslo_utils import importutils
 
-from nova.common import config
 import nova.conf
 from nova.db.sqlalchemy import api as sqlalchemy_api
+from nova import middleware
 from nova import rpc
 from nova import version
 
@@ -49,7 +49,7 @@ def parse_args(argv, default_config_files=None, configure_db=True,
     rpc.set_defaults(control_exchange='nova')
     if profiler:
         profiler.set_defaults(CONF)
-    config.set_middleware_defaults()
+    middleware.set_defaults()
 
     CONF(argv[1:],
          project='nova',

nova/middleware.py

@@ -15,7 +15,7 @@
 from oslo_middleware import cors
 
 
-def set_middleware_defaults():
+def set_defaults():
     """Update default configuration options for oslo.middleware."""
     cors.set_defaults(
         allow_headers=['X-Auth-Token',

setup.cfg

@@ -37,7 +37,7 @@ oslo.config.opts =
     nova.conf = nova.conf.opts:list_opts
 
 oslo.config.opts.defaults =
-    nova.conf = nova.common.config:set_middleware_defaults
+    nova.conf = nova.middleware:set_defaults
 
 oslo.policy.enforcer =
     nova = nova.policy:get_enforcer