Fetching metadata when no routing to leader does not comply to socket_timeout_ms parameter.

[szymonsobczak]

How to reproduce:

• initialise poseidon publisher, start kafka console consumer, publish test message (works)
• on kafka leader machine: sudo iptables -A INPUT -p tcp --dport 7200 -j DROP && sudo service kafka stop
• publish test message (message not delivered)
• refresh metadata - hangs for > 1min (no aggressive timeout here). After this time publishing messages works again