Add option to enable xpack trial

tasks/xpack/security/elasticsearch-xpack-activation.yml

@@ -17,5 +17,5 @@
     license_activated.json.license_status is not defined or
     license_activated.json.license_status != 'valid'
 
-- debug:
-    msg: "License: {{ license_activated }}"
+- name: License
+  debug: msg={{ license_activated }}

tasks/xpack/security/elasticsearch-xpack-trial-activation.yml

@@ -0,0 +1,18 @@
+---
+- name: Activate ES trial license (with security authentication)
+  uri:
+    method: POST
+    url: "{{ es_api_uri }}/_{{ 'xpack/' if es_version is version_compare('7.0.0', '<') else '' }}license/start_trial?acknowledge=true"
+    user: "{{es_api_basic_auth_username  | default(omit)}}"
+    password: "{{es_api_basic_auth_password | default(omit)}}"
+    return_content: yes
+    force_basic_auth: yes
+    status_code:
+      - 200
+      - 403
+    validate_certs: "{{ es_validate_certs }}"
+  register: trial_license_activated
+  when: es_xpack_trial
+
+- name: Trial license
+  debug: msg={{ trial_license_activated }}