[cli-ref] Update python-manilaclient to 1.8.1
[cli-ref] Update python-manilaclient to 1.8.1

Change-Id: I5ba0cb85285666d52496a51633e71ad77aaa33b8

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