Fix postgresql haproxy timeouts

Change-Id: I2650a0da6f6176ab6d0b7cd7e5a4683c0a00417c
diff --git a/docker/swarm/stack/postgresql.yml b/docker/swarm/stack/postgresql.yml
index 7ae4052..73435fb 100644
--- a/docker/swarm/stack/postgresql.yml
+++ b/docker/swarm/stack/postgresql.yml
@@ -11,6 +11,7 @@
           environment:
             POSTGRES_USER: ${_param:postgresql_admin_user}
             POSTGRES_PASSWORD: ${_param:postgresql_admin_user_password}
+            SQLALCHEMY_POOL_RECYCLE: 14400
           service:
             db:
               image: ${_param:docker_image_postgresql}