concourse.go
func (s *ConcoursePipeline) AddGitResource(name string, source map[string]interface{}) {
	s.AddResource(name, GitResourceName, source)
}
func (s *ConcoursePipeline) AddGitResource(name string, source map[string]interface{}) {
	s.AddResource(name, GitResourceName, source)
}
//AddGitResource git specific resource add