[cli-ref] Update python-neutronclient to 4.2.0
[cli-ref] Update python-neutronclient to 4.2.0

with improperly skipped subcommands

Closes-Bug: #1552158
Closes-Bug: #1551675
Change-Id: I51d6d318b0e31c2351b2b5496e3c9ad8d29a9e8c

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