skip validation on empty configmap
skip validation on empty configmap

kubernetes/ingress-gce,kubernetes/ingress-nginx,aledbf/ingress-nginx,nevetS/ingress,porridge/ingress,caicloud/ingress,jcmoraisjr/ingress,danielqsj/ingress,winfield-chen-hs/ingress,porridge/ingress,aledbf/ingress-nginx,arjanschaaf/ingress,caicloud/ingress,nicksardo/ingress,caicloud/ingress,coryfklein/ingress,kubernetes/ingress-nginx,coryfklein/ingress,literalice/ingress,canhnt/ingress,caiyixiang/ingress,jcmoraisjr/ingress,chentao1596/ingress,nicksardo/ingress,aledbf/ingress-nginx,caicloud/ingress,caiyixiang/ingress,danielqsj/ingress,kubernetes/ingress-nginx,canhnt/ingress,matthewg/ingress,canhnt/ingress,kubernetes/ingress-gce,matthewg/ingress,nevetS/ingress,literalice/ingress,winfield-chen-hs/ingress,canhnt/ingress,nicksardo/ingress,nicksardo/ingress,kubernetes/ingress-nginx,jcmoraisjr/ingress,kubernetes/ingress-nginx,arjanschaaf/ingress,chentao1596/ingress,aledbf/ingress-nginx