Generalization of lightweight build install

Swarm init with advertised address
Docker-compose file exposing only relevant ports
Docker env files updated to be generated by the installer

Change-Id: I8325d929b76564f5f1bf9fb49144e9b8c239f128
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/docker/ro-db.env b/installers/docker/ro-db.env
index 6f7297e..ac2a8d8 100644
--- a/installers/docker/ro-db.env
+++ b/installers/docker/ro-db.env
@@ -1 +1 @@
-MYSQL_ROOT_PASSWORD=osm4u
+MYSQL_ROOT_PASSWORD=__MYSQL_ROOT_PASSWORD__