XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.

* Remove WikiManager.Style and put it on resources instead.
XWIKI-9683: Packager mojo doesn't include test JARs
XRENDERING-317: Confluence XHTML parser should produce only non freestanding images and links
XRENDERING-316: XHTML white space filter does not support disabled namespaces support
[Misc] Allow checking for an empty livetable without incurring the timeout penalty.
[Misc] Expose GitHelper in a test jar so that other modules can reuse it in their tests
XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.

* Fix descriptor cache bug.
* Add extension names in POMs.
[Misc] Small improvement for tests
[cleanup] Removed useless XWiki.TagClass object
XWIKI-9691: Don't set explicit rights for XWikiAdminGroup on newly registered users
Done.
[cleanup] Applied codestyle
[cleanup] Removed ancient deprecated methods
[misc] Naming
General WikiStream cleanup
* move java beans to public packages to be validated by CLIRR
* add javadoc
* apply codestyle
[uncleanup] Adding back junk.
Merge remote-tracking branch 'upstream/master' into XWIKI-9693
[Misc] Add some new Livetable PO APIs
XWIKI-9705: The date search facets don't take the local timezone into account
* Use the new XAR XML export format.
XWIKI-9705: The date search facets don't take the local timezone into account
XWIKI-9684: Tag RSS feature is missing
XWIKI-9660: The user directory does not list filter options for StaticList properties
* Apply the new XAR XML format.