we should figure a acceptable serialization

a initial idea is to put it in as something like

{"gateway": { "id" : node.gateway.id, "spec": node.gateway.spec}}

refs

• fix: Report fails to render with pytest-xdist (1) pytest-html#591
• fix: Report fails to render with pytest-xdist (2) pytest-html#592
• fix: Report fails to render with pytest-xdist (3) pytest-html#593