BuildSpecs is inconsistent

[Stebalien]

It creates directories on disk but then doesn't actually write the spec config to disk. It should either do both or none.

iptb/testbed/testbed.go

Lines 71 to 91 in 9487788

	func BuildSpecs(base string, count int, typ string, attrs map[string]string) ([]*NodeSpec, error) {
	var specs []*NodeSpec
	for i := 0; i < count; i++ {
	dir := path.Join(base, fmt.Sprint(i))
	if err := os.MkdirAll(dir, 0775); err != nil {
	return nil, err
	}
	spec := &NodeSpec{
	Type: typ,
	Dir: dir,
	Attrs: attrs,
	}
	specs = append(specs, spec)
	}
	return specs, nil
	}