Perform fault wrapping in the openstack WSGI controller. This allows

us to just raise webob Exceptions in OS API controllers with the
appropriate explanations set. This resolves some inconsistencies
with exception raising and returning that could cause HTML output
to occur when an exception was raised.

nova/api/openstack/backup_schedules.py

@@ -19,7 +19,6 @@ import time
 
 from webob import exc
 
-from nova.api.openstack import faults
 from nova.api.openstack import wsgi
 
 
@@ -36,20 +35,20 @@ class Controller(object):
 
     def index(self, req, server_id, **kwargs):
         """ Returns the list of backup schedules for a given instance """
-        return faults.Fault(exc.HTTPNotImplemented())
+        raise exc.HTTPNotImplemented()
 
     def show(self, req, server_id, id, **kwargs):
         """ Returns a single backup schedule for a given instance """
-        return faults.Fault(exc.HTTPNotImplemented())
+        raise exc.HTTPNotImplemented()
 
     def create(self, req, server_id, **kwargs):
         """ No actual update method required, since the existing API allows
         both create and update through a POST """
-        return faults.Fault(exc.HTTPNotImplemented())
+        raise exc.HTTPNotImplemented()
 
     def delete(self, req, server_id, id, **kwargs):
         """ Deletes an existing backup schedule """
-        return faults.Fault(exc.HTTPNotImplemented())
+        raise exc.HTTPNotImplemented()
 
 
 def create_resource():