Creating user cinder in computes

The patch creates new classes system.linux.users.cinder and
system.nova.compute.volume.nfs The last one is supposed to be
included on nova-compute nodes is nfs backend is enabled to add
nova user to cinder group.

Change-Id: I720e1ecec0946ce37742d207161b03d5e4f0eb8a
Related-PROD: PROD-22772 (PROD:22772)
2 files changed