Auth and Header config set on the Collection level

[xaun]

It would be great to be able to configure auth and header options in collection settings that gets applied to all requests in that collection. This is useful for things like API keys and API versions.

[jackkav]

Add the key DEFAULT_HEADERS to your environment and foo will be sent as a header in all requests associated with this collection.

[subnetmarco]

This is possible to also setup as a folder-level configuration.