Deprecate support for [oslo_messaging_rabbit] heartbeat_in_pthread

... because the option has been deprecated.

Depends-on: https://review.opendev.org/925778
Change-Id: Ife00351446e7e93f83973741f612db2152ba7348

manifests/init.pp

@@ -123,16 +123,6 @@
 #   every 30 seconds.
 #   Defaults to $facts['os_service_default']
 #
-# [*rabbit_heartbeat_in_pthread*]
-#   (Optional) EXPERIMENTAL: Run the health check heartbeat thread
-#   through a native python thread. By default if this
-#   option isn't provided the  health check heartbeat will
-#   inherit the execution model from the parent process. By
-#   example if the parent process have monkey patched the
-#   stdlib by using eventlet/greenlet then the heartbeat
-#   will be run through a green thread.
-#   Defaults to $facts['os_service_default']
-#
 # [*rabbit_qos_prefetch_count*]
 #   (Optional) Specifies the number of messages to prefetch.
 #   Defaults to $facts['os_service_default']
@@ -287,6 +277,18 @@
 #   networks using 0x8a88 ethertype.
 #   Defaults to $facts['os_service_default'].
 #
+# DEPRECATED PARAMETERS
+#
+# [*rabbit_heartbeat_in_pthread*]
+#   (Optional) EXPERIMENTAL: Run the health check heartbeat thread
+#   through a native python thread. By default if this
+#   option isn't provided the  health check heartbeat will
+#   inherit the execution model from the parent process. By
+#   example if the parent process have monkey patched the
+#   stdlib by using eventlet/greenlet then the heartbeat
+#   will be run through a green thread.
+#   Defaults to undef
+#
 class neutron (
   $package_ensure                       = 'present',
   $bind_host                            = $facts['os_service_default'],
@@ -313,7 +315,6 @@ class neutron (
   $rabbit_ha_queues                     = $facts['os_service_default'],
   $rabbit_heartbeat_timeout_threshold   = $facts['os_service_default'],
   $rabbit_heartbeat_rate                = $facts['os_service_default'],
-  $rabbit_heartbeat_in_pthread          = $facts['os_service_default'],
   $rabbit_qos_prefetch_count            = $facts['os_service_default'],
   $rabbit_quorum_queue                  = $facts['os_service_default'],
   $rabbit_transient_quorum_queue        = $facts['os_service_default'],
@@ -346,6 +347,8 @@ class neutron (
   $max_allowed_address_pair             = $facts['os_service_default'],
   $vlan_transparent                     = $facts['os_service_default'],
   $vlan_qinq                            = $facts['os_service_default'],
+  # DEPRECATED PARAMETERS
+  $rabbit_heartbeat_in_pthread          = undef,
 ) {
 
   include neutron::deps

releasenotes/notes/deprecate-rabbit_heartbeat_in_pthread-0430fd49b1ef2824.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    The ``neutron::rabbit_heartbeat_in_pthread`` parameter has been deprecated
+    and will be removed in the future release.