Updated cinder nfs variable name so that it'll work
Updated cinder nfs variable name so that it'll work

The variable was nfs_client but it needs to be cinder_nfs_client
this commit renames that variable so that it'll function as
expected.

Change-Id: I09ab7eb2ed34237c41132596e998c7b24cd03f1f
Closes-Bug: 1453271
(cherry picked from commit f519817736a2c7490a9a417092ee4d22cfd6a3b3)

yanyao/openstack-deployment,yanyao/openstack-deployment,yanyao/openstack-deployment,yanyao/openstack-deployment,VaneCloud/openstack-ansible,VaneCloud/openstack-ansible,VaneCloud/openstack-ansible