test: check generated files for ansible_managed, fingerprint

[richm]

Clean up more ansible-lint issues in code and README

Add the following files: tests/tasks/check_header.yml and tests/templates/get_ansible_managed.j2. Use check_header.yml to check generated files for the ansible_managed and fingerprint headers. check_header.yml takes these parameters. fingerprint is required, and one of __file or __file_content:

• __file - the full path of the file to check e.g. /etc/realmd.conf
• __file_content - the output of slurp of the file
• __fingerprint - required - the fingerprint string system_role:$ROLENAME e.g. __fingerprint: "system_role:postfix"
• __comment_type - optional, default plain - the type of comments used

e.g. __comment_type: c for C/C++-style comments. plain uses #. See https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_filters.html#adding-comments-to-files for the different types of comment styles supported.

Example:

- name: Check generated files for ansible_managed, fingerprint
  include_tasks: tasks/check_header.yml
  vars:
    __file: /etc/myfile.conf
    __fingerprint: "system_role:my_role"

Signed-off-by: Rich Megginson rmeggins@redhat.com

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