juju/testing: JujuConnSuite now always ensures that APIInfo returns an api.Info struct with the UUID of the mock environment set correctly.
Found a simpler way to get the environ tag
Merge pull request #356 from davecheney/144-damn-you-jujuconnsuite-why-you-no-take-environment

juju/testing: APIInfo now returns apiInfo structs with the UUID configured.

JujuConnSuite now always ensures that APIInfo returns an api.Info struct with the UUID of the mock environment set correctly.