Fix missing environment variable in rabbitmq_init_bundle

After a template refactoring [2] we lost one environment variable
in HA container rabbitmq_init_bundle. Redeclare it to fix the issue.

[2] 81258ae551

Change-Id: I139c2c276c8f532d37fceafe06f9547048e76906
(cherry picked from commit b18c1f5544)

deployment/rabbitmq/rabbitmq-messaging-rpc-pacemaker-puppet.yaml

@@ -170,6 +170,7 @@ outputs:
               KOLLA_BOOTSTRAP: true
               # NOTE: this should force this container to re-run on each
               # update (scale-out, etc.)
+              TRIPLEO_DEPLOY_IDENTIFIER: {get_param: DeployIdentifier}
               RABBITMQ_CLUSTER_COOKIE:
                 yaql:
                   expression: $.data.passwords.where($ != '').first()