Add tcp-keepalive to redis conf, set default to 0 per normal installation.
Merge pull request #136 from arosenhagen/2.0.0_wip

Add tcp-keepalive to redis conf, set default to 0 per normal installation
Merge commit 'faa199b04814a333bbc01916afee3ff2e9c7c900' into test_kitchen_int
fix for debian 6.0.x systems running apt-get update before build-essential recipe