Add support for Cassandra 2.1.0-beta2 and upcoming 2.1* releases

[cdolivet]

• Allow to download beta versions of Cassandra
• Add quick support for new Cassandra 2.1 broadcast_rpc_address config var that conflict with rpc_address when set to 0.0.0.0

[nicolasff]

Thanks! Shouldn't broadcast_rpc_address be the IP though?

[cdolivet]

Maybe, let's be honest, my fix was mainly intended to let cassandra 2.1.0-beta2 start.
I don't know exactly the meaning of this broadcast config neither the really expected value.
If you confirm me that this should be the $IP, then I can change my pull request.

[morsmodre]

ping ~ will this be integrated into main?
Cassandra 2.1.0 doesn't run currently (the /usr/bin/start-cassandra doesn't work!)
thanks!

[johncant]

Yes, broadcast_rpc_address should be the IP. I got cassandra 2.1.1 to start with a similar line. However, I haven't been able to get multiple nodes of 2.1.1 to start yet.