Reset IO event on delete
Reset IO event on delete

We need to reset it, because it might be re-used later

Change-Id: I577ed6328c8ff3f64d0649b2f07a073915452213
Reviewed-on: http://review.couchbase.org/23171
Tested-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

signmotion/libcouchbase,couchbase/libcouchbase,mnunberg/libcouchbase,mody/libcouchbase,senthilkumaranb/libcouchbase,PureSwift/libcouchbase,mnunberg/libcouchbase,uvenum/libcouchbase,uvenum/libcouchbase,maxim-ky/libcouchbase,avsej/libcouchbase,mody/libcouchbase,trondn/libcouchbase,signmotion/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,trondn/libcouchbase,signmotion/libcouchbase,mnunberg/libcouchbase,kojiromike/libcouchbase,PureSwift/libcouchbase,couchbase/libcouchbase,PureSwift/libcouchbase,trondn/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,senthilkumaranb/libcouchbase,PureSwift/libcouchbase,uvenum/libcouchbase,kojiromike/libcouchbase,senthilkumaranb/libcouchbase,uvenum/libcouchbase,avsej/libcouchbase,mody/libcouchbase,maxim-ky/libcouchbase,trondn/libcouchbase,avsej/libcouchbase,trondn/libcouchbase,uvenum/libcouchbase,mnunberg/libcouchbase,signmotion/libcouchbase,couchbase/libcouchbase,maxim-ky/libcouchbase,avsej/libcouchbase,senthilkumaranb/libcouchbase,kojiromike/libcouchbase,mody/libcouchbase,couchbase/libcouchbase,maxim-ky/libcouchbase,mnunberg/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase