Bug #5196 : Exceptionaly, this contribution references a bug issue. Actually it takes into account that has been fixed on previous version of Silverpeas.

But the fixes that have been done can not be applied to master version because of the effective integration of the feature #4843 (forbidden download for readers). Indeed, this feature requested to upgrade resource access control mechanism and part of the fixes of the bug #5196 have been already implemented.

- handling a user role cache in order to increase the performances in cases of several call on same resources
- upgrading the node access controller to take into account some fixes made for previous versions of Silverpeas