Remove artificial constrains around notification drivers

According to
https://docs.openstack.org/newton/config-reference/config-format.html we
can have a list of notification drivers like:
driver = messaging
driver = log

Let's not impose extra limitation in THT as folks might want special
notifications setups.

Change-Id: I873574944af237e1ff998f0e9b9b261c53c46f54
Closes-Bug: #1795026

puppet/services/aodh-base.yaml

@@ -56,8 +56,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   RpcPort:
     default: 5672
     description: The network port for messaging backend

puppet/services/barbican-api.yaml

@@ -65,8 +65,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   RpcPort:
     default: 5672
     description: The network port for messaging backend

puppet/services/ceilometer-base.yaml

@@ -92,8 +92,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   GnocchiArchivePolicy:
     default: 'ceilometer-low-rate'
     type: string

puppet/services/cinder-api.yaml

@@ -72,8 +72,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
 
 conditions:
   cinder_workers_zero: {equals : [{get_param: CinderWorkers}, 0]}

puppet/services/congress.yaml

@@ -58,8 +58,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   RpcPort:
     default: 5672
     description: The network port for messaging backend

puppet/services/designate-base.yaml

@@ -66,8 +66,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
 
 conditions:
   service_debug_unset: {equals : [{get_param: DesignateDebug}, '']}

puppet/services/glance-api.yaml

@@ -166,8 +166,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   RpcPort:
     default: 5672
     description: The network port for messaging backend

puppet/services/heat-base.yaml

@@ -107,8 +107,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   HeatCorsAllowedOrigin:
     type: string
     default: ''

puppet/services/keystone.yaml

@@ -222,8 +222,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   KeystoneChangePasswordUponFirstUse:
     type: string
     default: ''

puppet/services/manila-base.yaml

@@ -52,8 +52,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   RpcPort:
     default: 5672
     description: The network port for messaging backend

puppet/services/mistral-base.yaml

@@ -53,8 +53,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   RpcPort:
     default: 5672
     description: The network port for messaging backend

puppet/services/neutron-base.yaml

@@ -93,8 +93,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   EnableInternalTLS:
     type: boolean
     default: false

puppet/services/nova-base.yaml

@@ -38,8 +38,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   NovaPassword:
     description: The password for the nova service and db account
     type: string

puppet/services/octavia-base.yaml

@@ -68,8 +68,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   OctaviaUserName:
     description: The username for the Octavia database and keystone accounts.
     type: string

puppet/services/sahara-base.yaml

@@ -52,8 +52,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   RpcPort:
     default: 5672
     description: The network port for messaging backend

puppet/services/tacker.yaml

@@ -58,8 +58,6 @@ parameters:
     type: string
     default: 'messagingv2'
     description: Driver or drivers to handle sending notifications.
-    constraints:
-      - allowed_values: [ 'messagingv2', 'noop' ]
   RpcPort:
     default: 5672
     description: The network port for messaging backend