make hostname update as optional

Author: TinOo512

defaults/main.yml

@@ -165,3 +165,6 @@ nginx_ngx_pagespeed_version: 1.9.32.4
 
 # OpenSSL configuration
 openssl_version: "1.0.2d"
+
+# Hostname update
+hostname_update: false

meta/main.yml

@@ -14,7 +14,8 @@ galaxy_info:
   - system
 
 dependencies:
-  - ANXS.hostname
+  - role: ANXS.hostname
+    when: hostname_update is defined and hostname_update == true
   - ANXS.apt
   - role: ANXS.build-essential
     when: nginx_install_method is defined and nginx_install_method == "source"