nvmetcli: Fix nvmet import

We should just need to import nvmet, which will run __init__.py and import
just the public things from nvmet/nvme.py.

Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

nvmetcli

@@ -23,7 +23,7 @@ from __future__ import print_function
 import os
 import sys
 import configshell_fb as configshell
-import nvmet.nvme as nvme
+import nvmet as nvme
 
 
 class UINode(configshell.node.ConfigNode):