Fix bug 1481: fix typo in kafka init-container command

Change-Id: I55b55ad9db8b346ada4df62496eec028a2c17661
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

installers/docker/osm_pods/kafka.yaml

@@ -48,7 +48,7 @@ spec:
       initContainers:
       - name: zookeeper-test
         image: alpine:latest
-        command: ["sh", "-c", "until nc -zvw1 zookeeper 2181; do sleep3; done; exit 0"]
+        command: ["sh", "-c", "until nc -zvw1 zookeeper 2181; do sleep 3; done; exit 0"]
       containers:
       - name: kafka
         image: wurstmeister/kafka:2.11-1.0.2