MainSuite.TestFirstRun2xFrom1xNotUbuntu forbidden (on closed network)

[Curtis Hovey]

As seen in
    http://reports.vapour.ws/releases/issue/57b1dacd749a5677bd99d07f

MainSuite.TestFirstRun2xFrom fails on a machine on a very restricted network

main_test.go:261:
    c.Assert(string(stderr), gc.Equals, `
    Since Juju 2 is being run for the first time, downloading latest cloud information.
    Fetching latest public cloud list...
    Your list of public clouds is up to date, see `[1:]+"`juju clouds`.\n")
... obtained string = "" +
... "Since Juju 2 is being run for the first time, downloading latest cloud information.\n" +
... "Fetching latest public cloud list...\n" +
... "error: Get https://streams.canonical.com/juju/public-clouds.syaml: Forbidden\n"
... expected string = "" +
... "Since Juju 2 is being run for the first time, downloading latest cloud information.\n" +
... "Fetching latest public cloud list...\n" +
... "Your list of public clouds is up to date, see `juju clouds`.\n"

[Nate Finch (natefinch)]

previously fixed here: https://github.com/juju/juju/pull/6002