[install-guide] Update the output of neutron ext-list command
[install-guide] Update the output of neutron ext-list command

The output list for the command "neutron ext-list" doesn't include the
address-scope. so it is removed from the list of output parameters

backport: Liberty

Change-Id: I51e878453565dd3b71cba2d53d7a1fe4377356e2
Closes-Bug: #1530022

AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals