Windows compatibility, HAProxy latest version, recoverability, durable storage, cluster size to 5

[ramonsmits]

• Increase cluster to 5 nodes
• Docker: Map HA Proxy port 1936
• Docker: Use durable volumes for rabbitmq nodes
• Docker: Use rabbitmq virtual network
• Apply docker-entrypoint.sh output change from https://github.com/serkodev/rabbitmq-cluster-docker/pull/3
• Replace tail with sleep infinity
• Ensure .sh use LR on Windows as CRLF causes "exec /usr/local/bin/cluster-entrypoint.sh: no such file or directory"
• Docker: Set restart to unless-stopped
• Docker: Remove obsolete version attribute
• Configure HAProxy to check health every 200 milliseconds and very quickly add/remove (un)healthy nodes
• Upgrade HAProxy to haproxy:3.0
• Using RABBITMQ_ERLANG_COOKIE to resolve "Cookie file /var/lib/rabbitmq/.erlang.cookie must be accessible by owner only"