restoreSuite.TestRestoreReboostrapBuiltInProvider map ordering wrong

[Curtis Hovey]

As see at
    http://reports.vapour.ws/releases/issue/578e8333749a5643a514108e

restoreSuite.TestRestoreReboostrapBuiltInProvider map ordering wrong

restore_test.go:271:
    _, err := testing.RunCommand(c, s.command, "restore", "-m", "testing:test1", "--file", "afile", "-b")
restore_test.go:267:
    c.Assert(args.Cloud, jc.DeepEquals, cloud.Cloud{
        Type: "lxd",
        AuthTypes: []cloud.AuthType{"empty", "certificate"},
        Regions: []cloud.Region{{Name: "localhost"}},
    })
... obtained cloud.Cloud = cloud.Cloud{Type:"lxd", AuthTypes:[]cloud.AuthType{"certificate", "empty"}, Endpoint:"", StorageEndpoint:"", Regions:[]cloud.Region{cloud.Region{Name:"localhost", Endpoint:"", StorageEndpoint:""}}, Config:map[string]interface {}(nil)}
... expected cloud.Cloud = cloud.Cloud{Type:"lxd", AuthTypes:[]cloud.AuthType{"empty", "certificate"}, Endpoint:"", StorageEndpoint:"", Regions:[]cloud.Region{cloud.Region{Name:"localhost", Endpoint:"", StorageEndpoint:""}}, Config:map[string]interface {}(nil)}
... mismatch at .AuthTypes[0]: unequal; obtained "certificate"; expected "empty"

[Cheryl Jennings (cherylj)]

Check was introduced in PR: https://github.com/juju/juju/pull/5825