[core] Adds `ssh_ip_address=` so users can override the ssh address per issue #2584
Merge branch 'master' of github.com:fog/fog into ssh_host
[core] updating Server models to use ssh_ip_address rather than public_ip_address
Merge branch 'master' of github.com:fog/fog into ssh_host
[core] updating ssh_ip_address to take a block in order to defer address specification to execution time.
Merge pull request #2597 from rackspace/ssh_host

[core] Add ability to specify IP Address for SSH, SCP and sshable?