Add help string to job-create
Add help string to job-create

Change-Id: I812186b7c89c8fdf3702c84da97dcdfaf7a381ce

citrix-openstack-build/python-saharaclient,openstack/python-saharaclient,citrix-openstack-build/python-saharaclient,citrix-openstack-build/python-saharaclient