Adds test for ring encryption
Adds test for ring encryption

Adds a test that turns on symmetric ring encryption, and verifies that
we can still share rumors.

Signed-off-by: Adam Jacob <0e18f44c1fec03ec4083422cb58ba6a09ac4fb2a@chef.io>

habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,rsertelon/habitat,rsertelon/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat