declare the use_forwarded_for flag

nova/api/ec2/__init__.py

@@ -47,6 +47,7 @@ flags.DEFINE_integer('lockout_window', 15,
 flags.DEFINE_string('keystone_ec2_url',
                     'http://localhost:5000/v2.0/ec2tokens',
                     'URL to get token from ec2 request.')
+flags.DECLARE('use_forwarded_for', 'nova.api.auth')
 
 
 class RequestLogging(wsgi.Middleware):

nova/api/ec2/metadatarequesthandler.py

@@ -30,6 +30,7 @@ from nova.api.ec2 import cloud
 
 LOG = logging.getLogger('nova.api.ec2.metadata')
 FLAGS = flags.FLAGS
+flags.DECLARE('use_forwarded_for', 'nova.api.auth')
 
 
 class MetadataRequestHandler(wsgi.Application):