allow unencrypted databags for storing secrets.

This will allow for easier storage of secrets for CI/dev type
environments as well as providing working unencrypted examples
of how the databags should be structured.

Documented that this should not be used for real
secrets.

Change-Id: I903086bea72fdcf76996fd5ebf98c552002de223
Merge "allow unencrypted databags for storing secrets."