localHTTPSServerSuite no trusty arm64 images

[Curtis Hovey]

as seen in
    http://reports.vapour.ws/releases/issue/56a6a870749a56019e363f71

ARM64 unit tests fail because the test does provide/fake arm64 agents
    c.Assert(err, jc.ErrorIsNil)
... value *errors.Err = &errors.Err{message:"", cause:(*errors.notFound)(0x4820630280), previous:(*errors.Err)(0x48206302d0), file:"github.com/juju/juju/environs/bootstrap/bootstrap.go", line:159} ("searching image metadata: invalid URL \"http://cloud-images.ubuntu.com/releases/streams/v1/index.sjson\" not found")

This happens in both wily+gccgo and trusty go1.5. This is a test suite issue. Many many unit tests failed for this reason (see an example from the issue above).

[Cheryl Jennings (cherylj)]

Fixed under: https://github.com/juju/juju/pull/5242