Fix opensearch healthcheck (open-telemetry#1742)

Author: julianocosta89

docker-compose.minimal.yml

@@ -657,7 +657,7 @@ services:
     ports:
       - "9200"
     healthcheck:
-      test: curl -s http://localhost:9200/_cluster/health | grep status | grep -q '\\(green\\|yellow\\)'
+      test: curl -s http://localhost:9200/_cluster/health | grep '"status":"green"'
       start_period: 10s
       interval: 5s
       timeout: 10s

docker-compose.yml

@@ -768,7 +768,7 @@ services:
     ports:
       - "9200"
     healthcheck:
-      test: curl -s http://localhost:9200/_cluster/health | grep -q '"status":"green"'
+      test: curl -s http://localhost:9200/_cluster/health | grep '"status":"green"'
       start_period: 10s
       interval: 5s
       timeout: 10s