Hopefully fix the random failure with:

test_connect (test.TestSSHServer) ... /srv/slapgrid/slappart3/srv/testnode/byx/soft/a452c8ac557f7eaea3c20f6cc373c390/eggs/paramiko-2.4.2-py2.7.egg/paramiko/client.py:822: UserWarning: Unknown ecdsa-sha2-nistp521 host key for [2001:67c:1254:e:4a::7bd5]:22222: 22c41f5090433152d1e5395a85d6cb4f
  key.get_name(), hostname, hexlify(key.get_fingerprint())
FAIL

======================================================================
FAIL: test_connect (test.TestSSHServer)
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Traceback (most recent call last):
  File "/srv/slapgrid/slappart3/srv/testnode/byx/soft/a452c8ac557f7eaea3c20f6cc373c390/parts/slapos-repository/software/seleniumserver/test/test.py", line 357, in test_connect
    self.assertIn("Welcome to SlapOS Selenium Server.", channel.recv(100))
AssertionError: 'Welcome to SlapOS Selenium Server.' not found in 'Attempt to write login records by non-root user (aborting)\r\r\n'

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Also publish the fingerprint of the server ssh key, which addresses this warning in the correct way (I feel) and since we can publish the fingerprint, why not.