Foreman 1.2.0 fails to authenticate via ssh for finish script and rolls back. I've tested this creating a Fedora 19 Host on Openstack Grizzly (from RDO). From the Fedora host logs I can see Foreman attempts to authenticate before the fedora user is actually created.

Reproduction:
1. Create new Fedora 19 Host through Foreman
2. Foreman provisions the host on Openstack
3. Foreman fails to authenticate
4. Foreman rolls back

• ssh.rb.old 2013-07-25 17:59:29.389244296 +0100
  --- ssh.rb 2013-07-25 18:00:23.041063187 +0100 *******
• 89,98 **
  --- 89,102 ----
  retry
  rescue Net::SSH::ConnectionTimeout
  logger.debug "Host timed out for #{address}, retrying"
  sleep(2)
  retry
  + rescue Net::SSH::AuthenticationFailed
  + logger.debug "Auth failed.. retrying"
  + sleep(2)
  + retry
  rescue Timeout::Error
  retry
  rescue => e
  logger.debug "SSH error: #{e.message}\n " + e.backtrace.join("\n ")
  end

I'm not sure this is a good fix but it works for me..