Switch from using tags to variables

Signed-off-by: Radovan Sroka <rsroka@redhat.com>

tests/tasks/check_not_present_header.yml

@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: MIT
+---
+- name: Get file
+  slurp:
+    path: "{{ __file }}"
+  register: __content
+  when: not __file_content is defined
+
+- name: Check for presence of ansible managed header, fingerprint
+  assert:
+    that:
+      - ansible_managed not in content
+      - __fingerprint not in content
+  vars:
+    content: "{{ (__file_content | d(__content)).content | b64decode }}"
+    ansible_managed: "{{ lookup('template', 'get_ansible_managed.j2') }}"