Simpler restart handling + issue-test for recreation of problems

tasks/elasticsearch-optional-user.yml

@@ -1,6 +1,8 @@
 ---
 #Add the elasticsearch user before installing from packages.
 - name: Ensure optional elasticsearch group is created with the correct id.
+  #Restart if these change
+  notify: restart elasticsearch
   group:
     state: present
     name: "{{ es_group }}"
@@ -8,6 +10,8 @@
     gid: "{{ es_group_id }}"
 
 - name: Ensure optional elasticsearch user is created with the correct id.
+  #Restart if these change
+  notify: restart elasticsearch
   user:
     state: present
     name: "{{ es_user }}"