Add timestamp to audit event if missing
Add timestamp to audit event if missing

Change-Id: Iada2fe32231e0a4167a45cc44eb0ae47872e15a3
Reviewed-on: http://review.couchbase.org/53013
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

daverigby/memcached,owendCB/memcached,cloudrain21/memcached-1,cloudrain21/memcached-1,daverigby/kv_engine,cloudrain21/memcached-1,daverigby/kv_engine,couchbase/memcached,daverigby/memcached,owendCB/memcached,daverigby/kv_engine,couchbase/memcached,daverigby/kv_engine,couchbase/memcached,owendCB/memcached,couchbase/memcached,daverigby/memcached,owendCB/memcached,daverigby/memcached,cloudrain21/memcached-1