ubuntuone-client tests access real certs

[John O'Brien]

The tests in ubuntuone-client throw the following exception when running tests if you don't have the certs installed. During tests, we should use snakeoil certs.

[ERROR]
    test_handshake_timeout_many ... Traceback (most recent call last):
  File "/home/john/canonical/ubuntuone/ubuntuone-client/bad-bad-symlink/ubuntuone/syncdaemon/action_queue.py", line 845, in _connect
    ssl_context = get_ssl_context(self.disable_ssl_verify)
  File "/home/john/canonical/ubuntuone/ubuntuone-client/bad-bad-symlink/ubuntuone/storageprotocol/context.py", line 29, in get_ssl_context
    '/etc/ssl/certs/UbuntuOne-Go_Daddy_Class_2_CA.pem', 'r').read())
exceptions.IOError: [Errno 2] No such file or directory: '/etc/ssl/certs/UbuntuOne-Go_Daddy_Class_2_CA.pem'
[ERROR]