Automate explorer reference export

Goal: update automatically explorer.nuxeo.com by updating an up-to-date release of the platform, with a given list of packages.

Final job at https://jenkins.platform.dev.nuxeo.com/job/nuxeo/job/nuxeo-explorer-jobs/job/export-platform-explorer-reference/
Triggers to be created in parent folder https://jenkins.platform.dev.nuxeo.com/job/nuxeo/job/nuxeo-explorer-jobs/

Reference list of packages

As of now, releases have included the following packages (list may need to be reviewed):

• cas2-authentication
• easyshare
• nuxeo-csv
• _nuxeo-dam removed see NXP-28626
• nuxeo-diff (linked tojsf-ui release)
• nuxeo-drive
• nuxeo-imap-connector
• nuxeo-multi-tenant
• nuxeo-platform-importer
• nuxeo-platform-user-registration (linked to jsf-ui release)
• nuxeo-quota
• nuxeo-signature
• nuxeo-template-rendering
• nuxeo-virtualnavigation (linked to jsf-ui release)
• shibboleth-authentication
• nuxeo-web-ui (released on its own)
• nuxeo-jsf-ui (released on its own)
• nuxeo-showcase-content (released on its own)
• nuxeo-liveconnect
• nuxeo-spreadsheet (linked to web-ui release)
• nuxeo-vision (released on its own)
• nuxeo-platform-3d

Upload strategy

Explorer plugin now relies on nuxeo-parent version --> it will hold a fixed server name when exporting the "live" runtime distribution, like "11.2.5" (currently).

==> Upload distributions using name "11.2.x" with actual server name (11.2.5 currently) as an alias, as well as alias "latest11.2.x", until release promotion.
On release promotion, the distribution will be named "11.2" (keeping alias "latest11.2.x").
Naming it 11.2.x with alias 11.2.5 will allow overriding it on 11.2.6 release (instead of piling up 11.2.1, 11.2.2, etc...).

Reference flow diagram