Fix usage of CinderNfsServers

This feature stopped working somewhere along the lines. In the past it
was working with parameter_defaults like this:

 CinderNfsServers: '10.0.0.254:/srv/nfs/cinder'

or

 CinderNfsServers: "[fd00:fd00:fd00:3000::1]:/srv/nfs/cinder"

The problem was that the templating escaped these strings, and
puppet-tripleo didn't receive a proper array, but a string.

This patch fixes this. It accepts strings as above as well as
comma-delimited lists of Nfs Servers.

Closes-Bug: 1671153
Change-Id: I89439c1d969e92cb8e0503de561e22409deafdfc

puppet/services/cinder-volume.yaml

@@ -94,11 +94,7 @@ outputs:
             tripleo::profile::base::cinder::volume::cinder_enable_nfs_backend: {get_param: CinderEnableNfsBackend}
             tripleo::profile::base::cinder::volume::cinder_enable_rbd_backend: {get_param: CinderEnableRbdBackend}
             tripleo::profile::base::cinder::volume::nfs::cinder_nfs_mount_options: {get_param: CinderNfsMountOptions}
-            tripleo::profile::base::cinder::volume::nfs::cinder_nfs_servers:
-              str_replace:
-                template: SERVERS
-                params:
-                  SERVERS: {get_param: CinderNfsServers}
+            tripleo::profile::base::cinder::volume::nfs::cinder_nfs_servers: {get_param: CinderNfsServers}
             tripleo::profile::base::cinder::volume::iscsi::cinder_lvm_loop_device_size: {get_param: CinderLVMLoopDeviceSize}
             tripleo::profile::base::cinder::volume::iscsi::cinder_iscsi_helper: {get_param: CinderISCSIHelper}
             tripleo::profile::base::cinder::volume::iscsi::cinder_iscsi_protocol: {get_param: CinderISCSIProtocol}

releasenotes/notes/fix-cinder-nfs-share-usage-0968f88eff7ffb99.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - Fixes an issue when using the CinderNfsServers
+    parameter_defaults setting.  It now works using a
+    single share as well as a comma-separated list of
+    shares.