SRCH-2148 use Elasticsearch 6.8.15 in dev/test environments

use Elasticsearch 6.8.15 in dev/test environments

Author: MothOnMars

.circleci/config.yml

@@ -25,7 +25,7 @@ jobs:
         type: string
       elasticsearch_version:
         type: string
-        default: 6.8.9
+        default: 6.8.15
     steps:
       - checkout
       - run:

docker-compose.yml

@@ -2,7 +2,7 @@ version: '3.8'
 
 services:
   elasticsearch:
-    image: docker.elastic.co/elasticsearch/elasticsearch:6.8.9
+    image: docker.elastic.co/elasticsearch/elasticsearch:6.8.15
     environment:
       - bootstrap.memory_lock=true
       - discovery.type=single-node
@@ -18,7 +18,7 @@ services:
       - 9200:9200
 
   kibana:
-    image: docker.elastic.co/kibana/kibana:6.8.9
+    image: docker.elastic.co/kibana/kibana:6.8.15
     depends_on:
       - elasticsearch
     ports: