Incorrect group name in conf when deprecated_group is not specified

[Sabari Murugesan]

When an opt is defined with a deprecated_name alias but not with
deprecated_group, the generated conf file assumes 'DEFAULT' section.

i.e say we do :-
opt = cfg.StrOpt('cinder_os_region_name', deprecated_name='os_region_name',
                  help=_('..'))
conf.register_opt([opt], group='glance_store')

we get the following in the generated conf file :-
 Deprecated group/name - [DEFAULT]/os_region_name
 cinder_os_region_name = <None>

Instead of,
 Deprecated group/name - [glance_store]/os_region_name
 cinder_os_region_name = <None>

On contrary, when you register such an opt, the deprecated_name is
associated against the registered group. Thus, the generated conf
is not in sync.

We found this issue when generating glance-api conf's but this
could be affecting other projects as well.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/288804
Committed: https://git.openstack.org/cgit/openstack/oslo.config/commit/?id=77505c7a5a34efddc7bdd8b6ccd371963b5f360d
Submitter: Jenkins
Branch: master

commit 77505c7a5a34efddc7bdd8b6ccd371963b5f360d
Author: Sabari Kumar Murugesan <email address hidden>
Date: Fri Mar 4 15:33:21 2016 -0800

    Incorrect group name when deprecated_group is not specified

    When an opt is defined with a deprecated_name alias but not with
    deprecated_group, the generated conf file assumes 'DEFAULT' section.

    i.e say we do :-
    opt = cfg.StrOpt('cinder_os_region_name', deprecated_name='os_region_name',
                      help=_('..'))
    conf.register_opt([opt], group='glance_store')

    we get the following in the generated conf file :-
     Deprecated group/name - [DEFAULT]/os_region_name
     cinder_os_region_name = <None>

    Instead of,
     Deprecated group/name - [glance_store]/os_region_name
     cinder_os_region_name = <None>

    On contrary, when you register such an opt, the deprecated_name is
    associated against the registered group. Thus, the generated conf
    is not in sync.

    We found this issue when generating glance-api conf's but this
    could be affecting other projects as well.

    Closes-Bug: #1554657
    Co-Authored-By: Tan Lin<email address hidden>
    Change-Id: I9577abec87b20fc3d74fb71e327e32d7def8ac5d

[Davanum Srinivas (DIMS) (dims-v)]

This issue was fixed in the openstack/oslo.config 3.11.0 release.