Do not set O_EXCL on open() when a published file is on the withdraw list.

Do not set O_EXCL on open() when a published file is on the withdraw list.

If during the process of applying RRDP deltas a object is published then
withdrawn and later published again the current code fails. This is because
published elements use O_EXCL in open() but in the case above the previous
file is still around since withdraws are delayed.

Problem noticed by job@
OK tb@