Merge pull request #852 from hansva/master

HOP-2938: change healthcheck on neo4j container

docker/integration-tests/integration-tests-neo4j.yaml

@@ -35,7 +35,7 @@ services:
     environment:
       - NEO4J_AUTH=neo4j/abcd
     healthcheck:
-      test: echo 'ok'
+      test: perl -MIO::Socket::INET -e 'exit(! defined( IO::Socket::INET->new("localhost:7687")))'
       interval: 10s
       timeout: 10s
       retries: 5