Rickard von Essen 0d7c3ac171
cloudstack: Allow reading api_url, api_key, and secret_key from env vars
If unset reads:

- `api_url` from `CLOUDSTACK_API_URL`
- `api_key` from `CLOUDSTACK_API_KEY`
- `secret_key` from `CLOUDSTACK_SECRET_KEY`
2017-07-14 07:34:11 +02:00
..
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