feat(cloud::juniper::mist::restapi): new plugin

[stephan-azerty]

Community contributors

Description

New plugin to monitor Juniper Mist cloud-managed networks through the Mist REST API,
authenticated with an organization read-only token.

Modes: api-test, certificates, devices, alarms, nac-authentications, licenses, list-sites.

Fixes # (issue)
If you are fixing a github Issue already existing, mention it here.

Type of change

• Patch fixing an issue (non-breaking change)
• New functionality (non-breaking change)
• Functionality enhancement or optimization (non-breaking change)
• Breaking change (patch or feature) that might cause side effects breaking part of the Software

How this pull request can be tested ?

Sample JSON responses and fixtures were provided by e-mail ahead of this PR.

Checklist

• [ More or less ] I have followed the coding style guidelines provided by Centreon
• [ X ] I have commented my code, especially hard-to-understand areas of the PR.
• [ X ] I have rebased my development branch on the base branch (develop).
• [ X ] I have provide data or shown output displaying the result of this code in the plugin area concerned.