ResourceGroup stack update fails with error

[Rabi Mishra]

ResourceGroup stack update with rolling__update fails with error.

 stack_status | UPDATE_FAILED |
| stack_status_reason | TypeError: resources.group_of_instances: _run_update() |
| | takes exactly 5 arguments (4 given) |
| stack_user_project_id | 4af3864a935a4bec8a8e95f680590455

2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource Traceback (most recent call last):
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource File "/opt/stack/heat/heat/engine/resource.py", line 601, in _action_recorder
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource yield
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource File "/opt/stack/heat/heat/engine/resource.py", line 924, in update
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource prop_diff])
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource File "/opt/stack/heat/heat/engine/scheduler.py", line 303, in wrapper
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource step = next(subtask)
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource File "/opt/stack/heat/heat/engine/resource.py", line 643, in action_handler_task
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource handler_data = handler(*args)
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource File "/opt/stack/heat/heat/engine/resources/openstack/heat/resource_group.py", line 439, in handle_update
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource checkers[0].start()
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource File "/opt/stack/heat/heat/engine/scheduler.py", line 200, in start
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource result = self._task(*self._args, **self._kwargs)
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource TypeError: _run_update() takes exactly 5 arguments (4 given)
2015-09-11 16:06:26.940 20725 ERROR heat.engine.resource

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/222569

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/222569
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=b9e465c83b1902480920fb4c0bb0e67d2320446c
Submitter: Jenkins
Branch: master

commit b9e465c83b1902480920fb4c0bb0e67d2320446c
Author: Rabi Mishra <email address hidden>
Date: Fri Sep 11 16:29:12 2015 +0530

    Remove 'names' parameter from '_run_update' function

    Change-Id: I43e17633ff65557e3c62b4e16b6beac815e4120b
    Closes-Bug: #1494703