Name for Connector DB container is needed

This needs to match with the name defined in:

https://github.com/samply/share-client/blob/feature/environmentPreconfiguration/Dockerfile

for POSTGRES_HOST under 'gbn'

gbn/docker-compose.yml

@@ -92,6 +92,7 @@ services:
     restart: "always"
 
   gbn-connector-db:
+    container_name: bridgehead-gbn-connector-db
     image: "postgres:10.17"
     environment:
       POSTGRES_DB: "samply.connector"