Replace a 5 second sleep with a poll in anaconda #196

When running through the installer with a site.attrs and rolls.xml in packer, ludicrous does not start in time to respond to initial requests in anaconda. Putting a manual sleep solves the issue. This should be replaced with something that poll-retry-(gently?)fails in the same place. See commit 9b37901

Ludicrous has a 'running' endpoint that could work as the poll target.