Bug fix

1. Close zookeeper connection.

Issue-ID: DCAEGEN2-1437

Change-Id: I7a2bfdcf14203cbe1708e6148b12ea00c49a07a1
Signed-off-by: Kate Hsuan <kate.hsuan@qct.io>
diff --git a/components/datalake-handler/feeder/src/main/java/org/onap/datalake/feeder/service/DmaapService.java b/components/datalake-handler/feeder/src/main/java/org/onap/datalake/feeder/service/DmaapService.java
index 0caec79..02aa626 100644
--- a/components/datalake-handler/feeder/src/main/java/org/onap/datalake/feeder/service/DmaapService.java
+++ b/components/datalake-handler/feeder/src/main/java/org/onap/datalake/feeder/service/DmaapService.java
@@ -67,6 +67,7 @@
 			List<String> topics = zk.getChildren("/brokers/topics", false);
 			String[] excludes = config.getDmaapKafkaExclude();
 			topics.removeAll(Arrays.asList(excludes));
+			zk.close();
 			return topics;
 		} catch (Exception e) {
 			log.error("Can not get topic list from Zookeeper, for testing, going to use hard coded topic list.", e);