As discussed in https://review.openstack.org/#/c/36352/ for each
command, we were setting api = identity or volume... etc,
this was for an old way of calling commands that are is no longer
used.
Also removed openstackclient/common/command.py
Change-Id: I2705f35d343f2ae729dc22d6aed0b852b2f8ca19
simple rebase
rewrite help for create, remove choices
Added create/delete/list/show/set for service
Modified setup.py
Change-Id: I5ced0e214cc2f7fc70493c66b4381040ce8122fe