Update documentation in the swift config file
Update documentation in the swift config file

Conflicts:
        etc/openstack_deploy/conf.d/swift.yml.example

Change-Id: I4cabbb0c620933a4e26e0172820ad0c728f544ff
(cherry picked from commit c64418d2f4dbf7bf6b813da13e882450f329af1a)

yanyao/openstack-deployment,VaneCloud/openstack-ansible,yanyao/openstack-deployment,yanyao/openstack-deployment,yanyao/openstack-deployment,VaneCloud/openstack-ansible,VaneCloud/openstack-ansible