import oslo-config

import oslo-config as of today.

    https://github.com/openstack/oslo-config.git
    commit df77677698483b58d6026994614cb847d25f9b69

this is a new version of the code which we currently have
in contrib/openstack.
mainly to obtain the following change.

    commit 16c4ecbefc94941821f3ae7ca253fad7bc377c58
    Author: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
    Date:   Wed Feb 13 14:01:46 2013 +0900

    sort options to make --help output prettier

    explicitly sort options when adding them to argparse.
    it's a bit silly to print them in a dict iteration order.

    Change-Id: Id508331d7ee3b24e76be7fa958d27d29905bd3d2
    Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
switch from openstack.common.cfg to oslo.config.cfg

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
remove no longer used contrib/openstack

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>