Match any IP address, not just the default

Before this update, when `does_server_match_node?` executes it only
checks the default route's ip address (node["ipaddress"]).

With this change it will now match *any* ip address attached to the
node, including ipv6 addresses.
Merge pull request #18 from kppullin/match_any_address

Match any IP address, not just the default