Add IP look up if the Cloud Provider is not null
Add Instance info to the Cloud Provider interface
Add support for populating host ip address.
Merge pull request #161 from brendandburns/next

Add population of the host IP address when on GCE.
Add IP to hostname in cloudcfg printing.
Merge pull request #163 from brendandburns/cloudcfg

Add IP to hostname in cloudcfg printing.