Skip git2go ssh tests due to upstream bug.
Skip git2go ssh tests due to upstream bug.

This can be undo once https://github.com/libgit2/git2go/issues/218 is
resolved.

There is an open PR https://github.com/libgit2/git2go/pull/219 that
resolves it, waiting on further review and not merged yet.

pombredanne/go-vcs,alexsaveliev/go-vcs,alexsaveliev/go-vcs,pombredanne/go-vcs