OO-962: fix the RS, enhance the method to accept an array of restricted types, expand and update the unit tests

OO-951: create a wrapper for the properties to update, it prevents the auto flush of the changes on the database

OO-948: make the ContextEntryControllerCreator cloneable, a cloned creator can save request dependent informations between the calls of the different method to prevent multiple loading of the same resource, calculate severals time the permissions...

OO-922 refactored default tools in collab tools to be thread save, disable wiki run when sec setting, chelp and i18n for security module

OO-852: implements the new bulk assessment wizard, move the task executor and scheduler in the services package

OO-863: filter html of some descriptions, doesn't escape score, point and duration, fix some french wording

OO-798, OO-797, OO-796: update the webdav implementation based on Tomcat, make OpenOLAt work under root context, small refactoring of the dispatchers, push raw files dispatcher to its own servlet, implements Digest authentication...