scripts: multi-machine installation kickstart
- BETTER Improves kickstart scripts and documentation by introducing multi-machine installation setup where each service (Elasticsearch, Celery, PostgreSQL, RabbitMQ, Redis) is running on a dedicated machine. This better emulates usual production environments.
- Provides directly runnable Vagrant configuration to test installation instructions. Useful for developers and daily verification builds.
Signed-off-by: Tibor Simko <tibor.simko@cern.ch>