Add 'API' to description of ironic command
Add 'API' to description of ironic command

An 'ironic help' displays information about the ironic command.
After the usage part, it shows 'Command-line interface to the
OpenStack Bare Metal Provisioning'.

This adds 'API.' to end that sentence.

Change-Id: If41c326ab31a96894eccef0a37921945a1e21ecd

bcrochet/python-ironicclient,rdo-management/python-ironicclient,varunarya10/python-ironicclient,openstack/python-ironicclient,JioCloud/python-ironicclient,NaohiroTamura/python-ironicclient,openstack/python-ironicclient,NaohiroTamura/python-ironicclient