Revert "Update kafka replicacount to 1"

This reverts commit 124b05e9.

Change-Id: I9fa18d1d7d95cb572b133961723015e0a1d536db
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

installers/helm/osm/values.yaml

@@ -205,7 +205,7 @@ kafka:
     client:
       protocol: "PLAINTEXT"
   fullnameOverride: "kafka"
-  replicaCount: 1
+  # replicaCount: 1
 
 keystone:
   enabled: true