SSHSuite.TestSSHCommand fails on windows

[Curtis Hovey]

As seen in
    http://reports.vapour.ws/releases/issue/57431759749a5665d7698eae

SSHSuite.TestSSHCommand fails on windows

ssh_test.go:164:
    expectedArgs.check(c, coretesting.Stdout(ctx))
ssh_common_test.go:85:
    // Check that the provided known_hosts file contained the
    // expected keys.
    c.Check(actualKnownHosts, gc.Matches, s.expectedKnownHosts())
... value string = ""
... regex string = "" +
... ".+ dsa-0\n" +
... ".+ rsa-0\n"

[Menno Finlay-Smits (menno.smits)]

This will no doubt be related to the changes I committed yesterday.

[Menno Finlay-Smits (menno.smits)]

Fix here: https://github.com/juju/juju/pull/5449