use managed by ansible macro in templates

roles/common/tasks/main.yml

@@ -1,7 +1,7 @@
 - name: resolv.conf
-  copy: src=resolv.conf dest=/etc/resolv.conf mode=0644 backup=yes
+  template: src=resolv.conf.j2 dest=/etc/resolv.conf mode=0644 backup=yes
 - name: locale.conf
-  copy: src=locale.conf dest=/etc/locale.conf mode=0644 backup=yes
+  template: src=locale.conf.j2 dest=/etc/locale.conf mode=0644 backup=yes
 - name: /etc/hosts
   template: src=hosts.j2 dest=/etc/hosts mode=0644 backup=yes
 - locale_gen: name=de_DE.UTF-8 state=present

roles/common/templates/hosts.j2

@@ -1,4 +1,4 @@
-# THIS FILE IS MANAGED BY ANSIBLE, DO NOT EDIT MANUALLY
+# {{ ansible_managed }}
 #
 # /etc/hosts: static lookup table for host names
 #

roles/common/templates/locale.conf.j2

@@ -1,3 +1,5 @@
+# {{ ansible_managed }}
+#
 LANG="de_DE.UTF-8"
 LC_MESSAGES="en_DK.UTF-8"
 LC_TIME="en_DK.UTF-8"

roles/common/templates/resolv.conf.j2

@@ -1,4 +1,4 @@
-# THIS FILE IS MANAGED BY ANSIBLE, DO NOT EDIT MANUALLY
+# {{ ansible_managed }}
 #
 # /etc/resolv.conf
 #