[Openib-windows] duplicate socket deadlock in WSD

[Yossi Leybovich]

Fab

I think there is deadlock in the duplicate socket flow

duplicate socket call wait_cq_drain with sock_info->mutex acquire
(ibsp_duplicate.c line 313) 
and even in the busy wait loop (wait_cq_drain function ) in its does not
release the mutex and wait to the counters to be 0.

But in the completion function (copletion_wq) in case of flush in error the
code try to acquire the mutex
so the completion function will not cont. and we are in deadlock

simple patch that solve it is to release the mutex before the sleep and
acquire it after the sleep 

10x
Yossi 
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