Avoid caching issue during the container setup operation

That may occurs if it's run several time in the same transaction (e.g. when
EnsureArchiveUnitHasAContentOp is run after it has been called).

hooks.py

@@ -47,6 +47,9 @@ class SetContainerOp(hook.DataOperationMixIn, hook.Operation):
             while peid in data:
                 peid = data[peid]
             entity = cnx.entity_from_eid(peid)
+            # we may run into caching issue if this operation is triggered several times in a
+            # transaction
+            entity.cw_clear_all_caches()
             adapter = entity.cw_adapt_to('IContained')
             if adapter is None:  # we reached the container
                 containers[eid] = peid