Automated PR: Standardising Files

[kitchen-porter]

This PR will standardise the files we have with out agreed spec in sous-chefs/repo-management.
This repo has been identified by topic(s) of chef-cookbook

[github-actions]

Slowest examples

Top 6 slowest examples (1.88 seconds, 99.99% of total time)

Example	Description	Time in seconds
spec/default_spec.rb:27	postfix::default on Ubuntu 20.04 [COOK-4423] renders file main.cf with /etc/postfix/cacert.pem	1.04144
spec/sasl_auth_spec.rb:13	postfix::sasl_auth password file template does not display sensitive information	0.67129
spec/default_spec.rb:13	postfix::default on Centos 8 [COOK-4423] renders file main.cf with /etc/pki/tls/cert.pem	0.10891
spec/wrapper_spec.rb:14	test::default _attributes recipes keeps wrapper cookbook default set attributes	0.05878
spec/default_spec.rb:31	postfix::default on Ubuntu 20.04 [COOK-4619] does not set recipient_delimiter	0.00089
spec/default_spec.rb:17	postfix::default on Centos 8 [COOK-4619] does not set recipient_delimiter	0.00085