Deprecating Dell EMC Xtremio Iscsi Volume Config

A new Dell EMC Xtremio volume config which supports
both iSCSI and FC drivers is added. Deprecating the
old Xtremio Iscsi config.
https://review.opendev.org/#/c/723020/

Change-Id: I333852460dd9e3bda55de7e2a11cf6cdab03ed35

manifests/profile/base/cinder/volume/dellemc_xtremio_iscsi.pp

@@ -33,6 +33,9 @@ class tripleo::profile::base::cinder::volume::dellemc_xtremio_iscsi (
 ) {
   include tripleo::profile::base::cinder::volume
 
+
+  warning('The dellemc_xtremio_iscsi class will be removed in V-Release, please use the dellemc_xtremio resource instead.')
+
   if $step >= 4 {
     cinder::backend::dellemc_xtremio_iscsi { $backend_name :
       backend_availability_zone         => hiera('cinder::backend::dellemc_xtremio_iscsi::backend_availability_zone', undef),

releasenotes/notes/xtremio_old_driver_deprecation_3368457faab68824.yaml

@@ -0,0 +1,4 @@
+---
+deprecations:
+  - Resource tripleo::profile::base::cinder::volume::dellemc_xtremio_iscsi
+    will be removed in V-Release.