Fixes handler and file issues with ES templates

Fixes an issue with handlers in Ansible 2.2.1+
[https://github.com/ansible/ansible/issues/20603](). Moves the
load-templates handler to the top of the file to get around this
issue.

Fixes an issue loading installed templates into ES. The use of
file lookup meant that the template files are checked on the
machine that initiated the Ansible play, this only works if Ansible
has been run locally, breaking for remote machines. Switched to
using the slurp module to grab file contents on the target machine.

handlers/elasticsearch-templates.yml

@@ -6,29 +6,29 @@
 - name: Wait for elasticsearch to startup
   wait_for: host={{es_api_host}} port={{es_api_port}} delay=10
 
-- name: Get template files
-  find: paths="/etc/elasticsearch/templates" patterns="*.json"
-  register: templates
-
 - name: Install templates without auth
   uri:
-    url: "http://{{es_api_host}}:{{es_api_port}}/_template/{{item.path | filename}}"
+    url: "http://{{es_api_host}}:{{es_api_port}}/_template/{{item | filename}}"
     method: PUT
     status_code: 200
     body_format: json
-    body: "{{ lookup('file', item.path) }}"
+    body: "{{ lookup('file', item) }}"
   when: not es_enable_xpack or not es_xpack_features is defined or "security" not in es_xpack_features
-  with_items: "{{ templates.files }}"
+  with_fileglob:
+    - "{{ es_templates_fileglob | default('') }}"
+  run_once: True
 
 - name: Install templates with auth
   uri:
-    url: "http://{{es_api_host}}:{{es_api_port}}/_template/{{item.path | filename}}"
+    url: "http://{{es_api_host}}:{{es_api_port}}/_template/{{item | filename}}"
     method: PUT
     status_code: 200
     user: "{{es_api_basic_auth_username}}"
     password: "{{es_api_basic_auth_password}}"
     force_basic_auth: yes
     body_format: json
-    body: "{{ lookup('file', item.path) }}"
+    body: "{{ lookup('file', item) }}"
   when: es_enable_xpack and es_xpack_features is defined and "security" in es_xpack_features
-  with_items: "{{ templates.files }}"
+  with_fileglob:
+    - "{{ es_templates_fileglob | default('') }}"
+  run_once: True