If the prefix is set we also set configPath=<prefix> in the
instance metadata, so config clients can pick it up and add it
to the home page URL.
Fixes gh-64, fixes gh-65
A EurekaInstanceConfig can declare a "zone" in its metadataMap, and then
it will be matched by the RibbonLoadBalancerClient. The zone of a server
is derived from the hostname - it is the whole host name or the host name
excluding the least significant subdomain (period separated identifier).
Fixes gh-29
Because we were using Lifecycle to kick off the eureka registration the
local server port wasn't available yet. The change is to use an
ApplicationListener and listen for the event that contains the container
with its port instead.
Fixes gh-15
Dave Syer
Spencer Gibb
Dave Syer