Mark Veritas CNFS Driver Unsupported

The Veritas CNFS driver CI stopped reporting
a long time ago and there has been no activity
from the vendor.

As a result this patch marks the driver
unsupported.  It will be removed in the 'V'
release if there is no change in support.

Change-Id: I541cebdabc0799273f1bc241c4b30948939f2f5d

cinder/volume/drivers/veritas_cnfs.py

@@ -54,6 +54,9 @@ class VeritasCNFSDriver(nfs.NfsDriver):
     CI_WIKI_NAME = "Veritas_Access_CI"
     DRIVER_VOLUME_TYPE = 'nfs'
 
+    # TODO(jsbryant) Remove driver in the 'V' release if CI is not fixed.
+    SUPPORTED = False
+
     def __init__(self, *args, **kwargs):
         self._execute = None
         self._context = None

doc/source/reference/support-matrix.ini

@@ -236,7 +236,7 @@ driver.seagate=complete
 driver.storpool=complete
 driver.synology=complete
 driver.vrtsaccess=missing
-driver.vrtscnfs=complete
+driver.vrtscnfs=missing
 driver.vmware=complete
 driver.win_iscsi=complete
 driver.win_smb=complete

releasenotes/notes/veritas_cluster_nfs_unsupported-88ab3ea5cbb6cd88.yaml

@@ -0,0 +1,14 @@
+---
+upgrade:
+  - |
+    The Veritas Clustered NFS driver has been marked as unsupported
+    and is now deprecated.  ``enabled_unsupported_driver`` will need
+    to be set to ``True`` in the driver's section in cinder.conf to
+    continue to use the driver.
+deprecations:
+  - |
+    The Veritas Clustered NFS driver has been marked as unsupported and
+    is now deprecated.  ``enable_unsupported_driver`` will need to be
+    set to ``True`` in the driver's section in cinder.conf to
+    continue to use the driver.  It its support status does not change
+    the driver will be removed in the 'V' development cycle.