concourse.go
func (s *ConcoursePipeline) AddGroup(name string, jobs ...string) {
	s.Groups = append(s.Groups, atc.GroupConfig{
		Name: name,
		Jobs: jobs,
	})
}
func (s *ConcoursePipeline) AddGroup(name string, jobs ...string) {
	s.Groups = append(s.Groups, atc.GroupConfig{
		Name: name,
		Jobs: jobs,
	})
}
//AddGroup helper to add a group to the pipeline manifest