Add import removed by backport of elastic/x-pack-elasticsearch#4437
Original commit: elastic/x-pack-elasticsearch@8462bbc3ee5ae95a3222d54cfc511b32d2b1e4e4
@@ -32,6 +32,7 @@ import org.elasticsearch.gateway.GatewayService;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.test.ESTestCase;
+import org.elasticsearch.test.VersionUtils;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.xpack.core.watcher.WatcherState;
import org.elasticsearch.xpack.core.watcher.execution.TriggeredWatchStoreField;
