libcouchbase_destroy should delete the event from libevent
libcouchbase_destroy should delete the event from libevent

Change-Id: I96e81610e9338ba3a3c6de4fb9a51c9a8c3c8965
Reviewed-on: http://review.couchbase.org/8696
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

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