Use plain routes list for os-security-groups instead of stevedore

This patch adds os-security-groups related routes by a plain list,
instead of using stevedore.

After all the Nova API endpoints moves to the plain routes list,
the usage of stevedore for API loading will be removed from Nova.

Partial-implement-blueprint api-no-more-extensions-pike

Change-Id: I3dde45b63cb633819d14b5fed55403f209347be4

nova/api/openstack/compute/routes.py

@@ -249,6 +249,10 @@ quota_set_controller = functools.partial(_create_controller,
     quota_sets.QuotaSetsController, [], [])
 
 
+security_group_controller = functools.partial(_create_controller,
+    security_groups.SecurityGroupController, [], [])
+
+
 server_controller = functools.partial(_create_controller,
     servers.ServersController,
     [
@@ -608,6 +612,15 @@ ROUTE_LIST = (
     ('/os-quota-sets/{id}/defaults', {
         'GET': [quota_set_controller, 'defaults']
     }),
+    ('/os-security-groups', {
+        'GET': [security_group_controller, 'index'],
+        'POST': [security_group_controller, 'create']
+    }),
+    ('/os-security-groups/{id}', {
+        'GET': [security_group_controller, 'show'],
+        'PUT': [security_group_controller, 'update'],
+        'DELETE': [security_group_controller, 'delete']
+    }),
     ('/os-server-external-events', {
         'POST': [server_external_events_controller, 'create']
     }),

nova/api/openstack/compute/security_groups.py

@@ -507,8 +507,6 @@ class SecurityGroups(extensions.V21APIExtensionBase):
         return []
 
     def get_resources(self):
-        secgrp_ext = extensions.ResourceExtension(ALIAS,
-                                                  SecurityGroupController())
         server_secgrp_ext = extensions.ResourceExtension(
             ALIAS,
             controller=ServerSecurityGroupController(),
@@ -516,7 +514,7 @@ class SecurityGroups(extensions.V21APIExtensionBase):
         secgrp_rules_ext = extensions.ResourceExtension(
             'os-security-group-rules',
             controller=SecurityGroupRulesController())
-        return [secgrp_ext, server_secgrp_ext, secgrp_rules_ext]
+        return [server_secgrp_ext, secgrp_rules_ext]
 
 
 # NOTE(gmann): This function is not supposed to use 'body_deprecated_param'