Neutron 'list' commands do not display 'fields' when there are no resources

Neutron 'list commands' do not display 'fields' when there are no resources available.

neutron --version - 2.3.4
tenant - admin

Examples:
1) (Neutron) When there is no network:
[devbox@localhost devstack]$ neutron net-list

2) (Neutron) When there is no subnet:
[devbox@localhost devstack]$ neutron subnet-list

3) (Neutron) When there is no router:
[devbox@localhost devstack]$ neutron router-list

4) (Nova) When there is no instance:
[devbox@localhost devstack]$ nova list
+----+------+--------+------------+-------------+----------+
| ID | Name | Status | Task State | Power State | Networks |
+----+------+--------+------------+-------------+----------+
+----+------+--------+------------+-------------+----------+

5) (Cinder) When there is no volume:
[devbox@localhost devstack]$ cinder list
+----+--------+--------------+------+-------------+----------+-------------+
| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+----+--------+--------------+------+-------------+----------+-------------+
+----+--------+--------------+------+-------------+----------+-------------+

Neutron client should also display 'fields' when there are no resources:
1) To keep consistent behaviour with other OpenStack clients.
2) User should get the idea what information will be displayed about the resources even though there are no corresponding network resources.