XWIKI-12356: Allow each QueryExecutor to control the right required to execute the query
XWIKI-11921: It should be possible to do Solr queries without current user based filtering

* use new standard field constant

* Replace <form action=""> by <form action="$doc.getURL()">. I could have simply removed the "action" property, but it is not valid in XHTML 1.0 and I would have broken Colibri.

* revert modification made by mistake

* don't extract description (no way to know it's field name)

* don't extract description (no way to know it's field name)

XWIKI-11940: Make internal the classes and interfaces of the LESS Module that should not have been public and refactor bad designed code
* bulletproofing

XWIKI-11939: Automatically remember login and passord of the current user to reuse it with REST based tools

* execute xar:format twice because of it's license related bug

* give more time to solr indexer

* more flexible behavior

* yes finally fixed that test

* qf take short fields names and not full fields names

* refactor based on XWIKI-11932

* bulletproofing

* fix checkstyle