Refresh aws cloudformation

This the second half from the slitting of PR #333. It is a sub PR of #523.

This PR collects templates and stacks and updates manageiq database. 

It depends on PR #899: add_orchestration_models. New changes are in the second commit as the first commit is for PR #899.
Can you make key and value explicit parameters?  Then, on line 125 do:

```ruby
process_collection(parameters, :orchestration_stack_parameters) do |(param_key, param_value), sequence|
  parse_stack_parameter(param_key, param_value, stack_id, sequence)
```