change: apply new APT keyring recommandations

tasks/main.yml

@@ -5,8 +5,10 @@
 
 # INSTALLATION
 - name: Add Filebeat GPG key to APT
-  apt_key:
+  get_url:
     url: "{{ elastic_gpg_key_url }}"
+    dest: /etc/apt/trusted.gpg.d/elastic.asc
+    mode: '0644'
   when: ansible_os_family == "Debian"
 
 - name: Add FileBeat repo to APT repositories