use latest version of zookeeper chart (#14107)

Signed-off-by: S.Cavallo <smcavallo@hotmail.com>

incubator/kafka/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 description: Apache Kafka is publish-subscribe messaging rethought as a distributed
   commit log.
 name: kafka
-version: 0.15.3
+version: 0.15.4
 appVersion: 5.0.1
 keywords:
 - kafka

incubator/kafka/requirements.lock

@@ -1,6 +1,6 @@
 dependencies:
 - name: zookeeper
   repository: https://kubernetes-charts-incubator.storage.googleapis.com/
-  version: 1.2.0
-digest: sha256:48de211cbffc0b7df9995edc4fd5d693e8bbc94e684aa83c11e6f94803f0e8b9
-generated: 2018-11-26T17:47:36.893674-05:00
+  version: 1.3.1
+digest: sha256:c21214b1f44972d0c120e73c9ff4af5f420a1e6c5c387e0ef440a181c45f053e
+generated: 2019-05-23T15:54:57.740788654-04:00

incubator/kafka/requirements.yaml

@@ -1,6 +1,6 @@
 dependencies:
 - name: zookeeper
-  version: 1.2.0
+  version: 1.3.1
   repository: https://kubernetes-charts-incubator.storage.googleapis.com/
   condition: zookeeper.enabled