cubicweb #1514780 heavy migration trigger nasty hooks [resolved]

breaking migration... Two hooks must be fixed : * the CWUniqueConstraint hook must not react on after_update_entity (affect stable branch) * the source synchro hook on CWSourceHostConfig must filter out some cases to avoid pb mostly specific to 3.11 migration

priorityimportant
typebug
done in3.11.1
load0.200
load left0.000
closed by<not specified>