Jbau/email tz

Add tagging for ruby tasks, also set PATH so that manual work on

instances is a bit easier.
Also subsumes @sefk's  https://github.com/edx/configuration/pull/42

cloudformation: open tcp/9418 for git

Jarv/better elb rolling

This rolls the ec2 elb management script into a module.
Now if an ELB is added or removed "changed" will return True/False
so you can tell if any action was taken based on the coloring of
the response (yellow/green).

role for upstart tasks, parameterized in the style the nginx role

Happened to notice this while I was in here, mostly a cosmetic fix.

Tiny documentation update

Update 'edx' group to 'adm' group in LMS setup

* Use the 'adm' group for permissioning assets needed during LMS
  initialization, because ubuntu doesn't have the edx user until it logs
  out and logs back in.

where it can take a {{ service_variant }} param