XWIKI-20059: Creating a subwiki with a flavor depending on the standard subwiki flavor with custom XWikiPreferences raises conflict error
XWIKI-19880: Subwiki created from flavor have the wrong pages author when the instance contains XAR extensions installed on root namespace
Use a Java 8 compatible version to make esier to keep in sync on all supported branches

XCOMMONS-2492: Automatically try to convert the input job request when it does not have the expected type
* don't change the visibility of the default constructor

XWIKI-20064: Cannot use the DefaultResourceReferenceSerializer component with a TemporaryResourceReference

XCOMMONS-2492: Automatically try to convert the input job request when it does not have the expected type
* add test

XCOMMONS-2492: Automatically try to convert the input job request when it does not have the expected type

* remove unused import

* Improve test and coverage

* Improve test and coverage

XWIKI-20059: Creating a subwiki with a flavor depending on the standard subwiki flavor with custom XWikiPreferences raises conflict error
XWIKI-19880: Subwiki created from flavor have the wrong pages author when the instance contains XAR extensions installed on root namespace

* Add support for PageAttachmentReference
* Fix NPE bug in DAB

* Refactor XWiki oldcore which was using several classes from the Formula Renderer using a hack so that that PDF export would be able to include formulas. The refactoring was done to offer a generic implementation for PDF export, based on the Resource module, to handle all type of resources. The Formula macro moved in contrib was also modified to use Temporary Resources, thus making it compatible with the refactoring done for PDF export.

Currently translated at 100.0% (4417 of 4417 strings)

Translation: XWiki Platform/XWiki Core Resources
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-core-resources/fr/

XWIKI-19922: Docker-based PDF Export doesn't work if the XWiki server runs on Windows
* We can't use the Chrome container IP to communicate (on Windows and MacOS) unless we are also inside a Docker container (on the same network)

* Fix checkstyle errors (except Class Fan out)
* Activate checkstyle
* Remove unused code and parameters

[Misc] The pipeline logic was changed to keep the last 20 builds for contrib projects. We need to override the config to make it as it was before that change
* "env.BRANCH_NAME" is not available since we're inside a closure called inside xwikiBuild, before any git checkout is done

[Misc] The pipeline logic was changed to keep the last 20 builds for contrib projects. We need to override the config to make it as it was before that change

* Small refactoring to separate the docker container management from the PDF printing, and also to put the focus on "Chrome" because Docker is just one way to have Chrome running (it's more of an implementation detail).

- Use org.xwiki.container.Container component to retrieve the current Request
  instead of Provider<XWikiContext>