Dodge deprecation warnings in plugin and template install by working as per http://docs.ansible.com/ansible/playbooks_conditionals.html#loops-and-conditionals

tasks/elasticsearch-templates.yml

@@ -8,9 +8,8 @@
 
 - name: Copy templates to elasticsearch
   copy: src={{ item }} dest=/etc/elasticsearch/templates owner={{ es_user }} group={{ es_group }}
-  when: es_templates_fileglob is defined
   with_fileglob:
-    - "{{ es_templates_fileglob }}"
+    - "{{ es_templates_fileglob | default('') }}"
 
 - set_fact: http_port=9200
   tags:
@@ -30,4 +29,4 @@
 
 - name: Install template(s)
   command: "curl -sL -XPUT http://localhost:{{http_port}}/_template/{{item}} -d @/etc/elasticsearch/templates/{{item}}.json"
-  with_items: "{{ resultstemplate.stdout_lines }}"
+  with_items: "{{ resultstemplate.stdout_lines | default([]) }}"