[iops-unit-tests] Free timers in dtor
[iops-unit-tests] Free timers in dtor

Change-Id: Ic135cd927a5912b7a3e770f92794f810f106f1d3
Reviewed-on: http://review.couchbase.org/28187
Tested-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>

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