Fix Chutney Nodes that don't bootstrap
In https://trac.torproject.org/projects/tor/ticket/14881#comment:58 , pastly reports:
{{{ ./nodes.basic-min/000a/ probably failed to bootstrap ./nodes.basic-min/001a/ probably failed to bootstrap ./nodes.basic-min/002r/ probably failed to bootstrap ./nodes.bridges-ipv6-min/000a/ probably failed to bootstrap ./nodes.bridges-ipv6-min/001ba/ probably failed to bootstrap ./nodes.bridges-ipv6-min/002r/ probably failed to bootstrap ./nodes.bridges-min/000a/ probably failed to bootstrap ./nodes.bridges-min/001ba/ probably failed to bootstrap ./nodes.bridges-min/002r/ probably failed to bootstrap ./nodes.ipv6-exit-min/000a/ probably failed to bootstrap ./nodes.ipv6-exit-min/001a/ probably failed to bootstrap ./nodes.ipv6-exit-min/002r/ probably failed to bootstrap }}}
We should fix this. We should also integrate this check into chutney.