[facet js] fix reordering of facet check boxes. Closes #2732947 Before this patch, when one select an element, it's moved to the top of the select content. Fine. But when it's later deselected, it stays there instead of moving back to its original location. This patch fixes that by introducing a facetCheckBoxReorder function which properly reorder the whole facet, instead of buggy attempt to locally reorder.

[vreg] (re)build entity classes cache after registry initialization. This fix potential memory fragmentation issue. Closes #2719113

[task] allow negative intervals for add_looping_task (closes #2818280) Instead of rejecting values < 0 with a ValueError, we ignore tasks with a negative interval. This introduce a simple way to disable task from configuration.

[task] allow interval=0 for looping tasks There is valid usecase for perpetual running task.

[portable dump] skip virtual relations, they have no table associated. Closes #2841199

[test] fix skipIf import, currently failing if unittest2 is not there

[test] fix bad merge

merge with other default head

[ldap] an empty 'user-base-dn' disable the user importation process, The same semantic will be used for group. We start by using it for user for the sake of consistency.

drop commented print