Use id for doc id if it exists

salt/logstash/pipelines/config/so/9500_output_beats.conf.jinja

@@ -7,6 +7,23 @@
 {%- set ES_PASS = salt['pillar.get']('elasticsearch:auth:users:so_elastic_user:pass', '') %}
 output {
   if "beat-ext" in [tags] and "import" not in [tags] and "filebeat" not in [metadata][pipeline] {
+    if [metadata][_id] {
+      elasticsearch {
+        pipeline => "beats.common" 
+        hosts => "{{ ES }}"
+  {% if salt['pillar.get']('elasticsearch:auth:enabled') is sameas true %}
+        user => "{{ ES_USER }}"
+        password => "{{ ES_PASS }}"
+  {% endif %}
+        index => "so-beats"
+        template_name => "so-beats"
+        template => "/templates/so-beats-template.json"
+        template_overwrite => true
+        ssl => true
+        ssl_certificate_verification => false
+        document_id => "%{[metadata][_id]}" 
+      }
+      } else {
       elasticsearch {
         pipeline => "beats.common" 
         hosts => "{{ ES }}"
@@ -23,3 +40,4 @@ output {
       }
   }
  }
+}