Notification drivers need to be a list

Convert the NotificationDriver to a comma_delimited_list.
This will still not break existing templates because passing
a string is still completely valid. This is done so that the hiera keys
will be passed down as lists.

The oslo::messaging::notifications::driver expects a list anyway so this
won't break things and will allow us to actually specify multiple
notification drivers correctly. The change that allowed
oslo::notifications to use both strings and lists is
If65946412b42e0919456ed92fdd8e3788ad67872 (Messaging notifications
should be set as a list)

Related-Bug: #1851629

Change-Id: I24c860cd3121e5c307233864818ca86967ff6d72

deployment/aodh/aodh-base.yaml

@@ -58,7 +58,7 @@ parameters:
     default: 'regionOne'
     description: Keystone region for endpoint
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
 

deployment/barbican/barbican-api-container-puppet.yaml

@@ -160,7 +160,7 @@ parameters:
     default: {}
     type: json
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   DeployIdentifier:

deployment/ceilometer/ceilometer-base-container-puppet.yaml

@@ -73,7 +73,7 @@ parameters:
     type: string
     hidden: true
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   GnocchiArchivePolicy:

deployment/cinder/cinder-api-container-puppet.yaml

@@ -81,7 +81,7 @@ parameters:
     default: {}
     type: json
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   RootStackName:

deployment/deprecated/mistral/mistral-base.yaml

@@ -51,7 +51,7 @@ parameters:
     type: string
     hidden: true
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   KeystoneRegion:

deployment/experimental/designate/designate-base.yaml

@@ -63,7 +63,7 @@ parameters:
     description: Set rabbit subscriber port, change this if using SSL
     type: number
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
 

deployment/glance/glance-api-container-puppet.yaml

@@ -209,7 +209,7 @@ parameters:
     default: {}
     type: json
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   EnableInternalTLS:

deployment/heat/heat-base-puppet.yaml

@@ -124,7 +124,7 @@ parameters:
     description: Maximum raw byte size of the Heat API JSON request body.
     type: number
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   HeatCorsAllowedOrigin:

deployment/keystone/keystone-container-puppet.yaml

@@ -175,7 +175,7 @@ parameters:
     default: {}
     hidden: true
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   KeystoneChangePasswordUponFirstUse:

deployment/manila/manila-base.yaml

@@ -54,7 +54,7 @@ parameters:
     type: string
     hidden: true
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
 

deployment/neutron/neutron-base.yaml

@@ -102,7 +102,7 @@ parameters:
                  via parameter_defaults in the resource registry.
     type: json
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   EnableVLANTransparency:

deployment/nova/nova-base-puppet.yaml

@@ -35,7 +35,7 @@ parameters:
     default: 'regionOne'
     description: Keystone region for endpoint
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   NovaPassword:

deployment/octavia/octavia-base.yaml

@@ -52,7 +52,7 @@ parameters:
         Remove configuration that is not generated by TripleO. Used to avoid
         configuration remnants after upgrades.
   NotificationDriver:
-    type: string
+    type: comma_delimited_list
     default: 'noop'
     description: Driver or drivers to handle sending notifications.
   OctaviaUserName: