fix #1385 dstats not killed
fix #1385 dstats not killed

pveentjer/hazelcast-simulator,Donnerbart/hazelcast-simulator,hazelcast/hazelcast-simulator,Donnerbart/hazelcast-simulator,hazelcast/hazelcast-simulator,hazelcast/hazelcast-simulator,jerrinot/hazelcast-stabilizer,jerrinot/hazelcast-stabilizer,pveentjer/hazelcast-simulator