remove turing off of iptables.  new plan is just to document not
to use with a oppressive firewall.
tweaks to generation of foreman_client.sh.

* install rubygems from foreman repo for now to meet that dependency
  requirement.
* call "puppet agent" twice so that when we start the service, it
  should be fully initialized (cert pulled down and known to the
  puppet server).
Merge pull request #10 from cwolferh/work2

Work2
Updates for foreman 1.2
Update foreman_server.sh
Merge pull request #11 from ohadlevy/patch-1

Update foreman_server.sh