Update the keystone-manage man page options
Update the keystone-manage man page options

Several of the command line options don't match the current output
from keystone-manage -h.

Here's the output of keystone-manage to compare with the new man
page content:
http://paste.openstack.org/show/508828/

Change-Id: I60d212c5930fcd450745b10155b578faff0e4654

openstack/keystone,rajalokan/keystone,ilay09/keystone,ilay09/keystone,rajalokan/keystone,mahak/keystone,openstack/keystone,mahak/keystone,cernops/keystone,openstack/keystone,rajalokan/keystone,ilay09/keystone,mahak/keystone,cernops/keystone