[WIP]collect aws cloudformation templates and stacks at Amazon refreshing

I see what you are doing, and this is not the right way to do it...if you want to call methods on the provider, you should really go through the `with_provider_connection` method.

Something like:

```ruby
with_provider_connection(:source => "CloudFormation") do |connection| # can't remember the option off-hand
  connection.stacks[name].update(options)
end
```

Also, the `if ext_management_system.is_a? EmsAmazon` is screaming for STI subclassing of all of these models.  This is something we should do anyway since we do it for all of the other CIs we introduce.  That way, update_stack_in_cloud would be different for each subclass and you wouldn't need to have the conditionals.

As far as the method name goes, the cloud seems redundant, though I see what you're trying to say.  Typically we have a "raw_" method for the raw provider operation, which might be clearer here... `raw_update_stack`.  Still isn't a great name.  @gmcculloug Thoughts?