XE-1357: xwiki-enterprise-ui-wiki-all is wrong
XWIKI-9916: Guests are allowed to delete XWikiServer[Name] documents

- Disallow CREATOR right to public
[Misc] Fix integration tests that flicker on xwiki-platform-wiki.
[Misc] Fix integration tests that flicker on xwiki-platform-wiki.

* Maybe the timeout is too short.
XWIKI-9942: WikiStream XAR input should fallback on XAR file instead of XML document when it can't find what is the stream type
[misc] Remove debug leftover
XWIKI-9943: Wikis DW step always get back after a restart as long as there is not upgraded wikis
[misc] Add missing transient (it's useless to serialize that)
XWIKI-9944: The Continue button is not available on the Extensions step when all extensions are up to date
XWIKI-9379: Importing a XAR that contains a document called "null" does not work
* fix regression introduced in previous commit
[misc] Fix typo
[misc] Fix typo
XWIKI-9945: One bad document title can prevent Solr from indexing other documents
* Prevent infinite recursion by keeping a stack of documents whose titles are currently being displayed (on the current execution context).
* Also, make sure we pop the document from context only if the push is successful, otherwise we'll end up with an Execution with no ExecutionContext, which will cause lots of NPE for components that want to access the XWiki context from the ExecutionContext.
[misc] Improve documentation
[misc] Bulletproofing
Add new files forgotten in previous commit
XWIKI-9948: Make it easy to get functional tests screenshots from CI
XWIKI-9949: Add ability to pass a timeout when waiting for an element
XWIKI-9951: The template wiki provisioning job does not log errors.
XWIKI-9692: Write integration tests for xwiki-platform-wiki.

* Use waitUntilElementIsVisible instead of my own timeout handling.
* Try to fix the flickering with a timeout of 30sec instead of 9.