[common/elasticsearch] update elasticsearch image

switch to version 7.6.2 in guilin

Issue-ID: OOM-2579
Signed-off-by: Alexander Dehn <alexander.dehn@highstreet-technologies.com>
Change-Id: I08e226b1898ee299e8cdf1165f2783b857bcfb03
Signed-off-by: Alexander Dehn <alexander.dehn@highstreet-technologies.com>
diff --git a/kubernetes/common/elasticsearch/components/data/values.yaml b/kubernetes/common/elasticsearch/components/data/values.yaml
index 5624bee..a9e3d78 100644
--- a/kubernetes/common/elasticsearch/components/data/values.yaml
+++ b/kubernetes/common/elasticsearch/components/data/values.yaml
@@ -46,7 +46,7 @@
   - name: http-transport
     port: 9300
 
-image: bitnami/elasticsearch:6.8.6-debian-9-r23
+image: bitnami/elasticsearch:7.6.1
 ## Specify a imagePullPolicy
 ## Defaults to 'Always' if image tag is 'latest', else set to 'IfNotPresent'
 ## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images