Set ssl_dir to its defaults on Ubuntu LTS versions, from 18.04 to 22.04

[egypcio]

Description

Set ssl_dir to its defaults on Ubuntu LTS versions, from 18.04 to 22.04

Motivation and Context

By merging this one, we would be able to fix an erroneous configuration setting the ssl_dir variable to a value which does not reflect what's defined by default on Ubuntu.

According to one of Ubuntu's official documentation the certificates live under /etc/ssl/certs instead of what was set before; /etc/ssl.

How Has This Been Tested?

After changing the misp_base_port to 443 (which would require setting up TLS certificates), we:

• Applied this role, against (fresh installed) Ubuntu machines using the particular versions affected by this change request;
• Verified the presence of a default value set as ETCCERTSDIR on /usr/sbin/update-ca-certificates (on the machines);
• Checked the list of files and their dependencies via dpkg -S and packages repository information (e.g.: 20.04);
• Consulted the update-ca-certificates(8) manpage.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document. (this repository does not offer one)
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed including pre-commit and github actions.
• [ ] Used in production.

[juju4]

Thanks for the multiple PR! It's strange. I had thought to have changed that sometime ago but likely another role.

Contributing.md is in .github folder and normally shown by github footer and right panel: https://github.com/juju4/ansible-MISP/blob/67081d039df7747db2f3dabf0f77ea8d3b252084/.github/CONTRIBUTING.md