Openstack cloud network, security group, floating IP filtering based on selected tenant

https://bugzilla.redhat.com/show_bug.cgi?id=1142487

Filter configuration items based on selected tenant, if the tenant is not selected it uses the provider to list all the configuration items.
Discussed with @blomquisg and I think adding the auto_select_single flag is the best default option.  This is options # 2 from above.  This is the default dialog and the user has the ability to modify if they want to enforce a different action.