zuul: new LVM/nvmet job (relevant scenario)

This is a patch that adds a new LVM/nvmet job which also
exercises a few relevant code paths in os-brick
which are likely to be used in a production environment:

- Uses the new NVMe-oF connection information.

- Uses NVMe-oF native multipathing, even if it's by using the local IP
  address, which is not real multipathing.

- Shares the namespace for all connections on the same node.

Change-Id: I35beb893ad135043deb5a4ea283e0d668692a438
2 files changed