[Neutron][Improvement]Neutron can ask user to see the help file in case the user passes wrong arguments in CLI

Openstack CLIs have the support of displaying help file for all components, specifically neutron.
However, for a new user/developer, understanding the help file is important.

When we pass incorrect attributes to a nova client, we get the following output:
##########################
reedip@reedip-VirtualBox:/opt/stack/sqlalchemy$ nova agent-delete
usage: nova agent-delete <id>
error: too few arguments
Try 'nova help agent-delete' for more information.
##########################

The last line gives a useful information to the new user/developer as to what he/she can do to find out more information.
Something like this can be added to the neutron-client as well

Current output of neutron client:
##########################
reedip@reedip-VirtualBox:/opt/stack/sqlalchemy$ neutron firewall-create
usage: neutron firewall-create [-h] [-f {html,json,shell,table,value,yaml}]
                               [-c COLUMN] [--max-width <integer>]
                               [--prefix PREFIX] [--request-format {json,xml}]
                               [--tenant-id TENANT_ID] [--name NAME]
                               [--description DESCRIPTION] [--shared]
                               [--admin-state-down] [--router ROUTER]
                               POLICY
neutron firewall-create: error: too few arguments
##########################

Expected output:
##########################
reedip@reedip-VirtualBox:/opt/stack/sqlalchemy$ neutron firewall-create
usage: neutron firewall-create [-h] [-f {html,json,shell,table,value,yaml}]
                               [-c COLUMN] [--max-width <integer>]
                               [--prefix PREFIX] [--request-format {json,xml}]
                               [--tenant-id TENANT_ID] [--name NAME]
                               [--description DESCRIPTION] [--shared]
                               [--admin-state-down] [--router ROUTER]
                               POLICY
neutron firewall-create: error: too few arguments
Try 'neutron help firewall-delete' for more information.
##########################