This PR uses the "SelectorFromSet()" function which takes alabel or
selector as an argument returns all the object that uses that label or
selector. Once we get the object that uses a particular label we can
further do the delete operation on them. This is similar to "kubectl
delete <object> --selector=<key>=<value>". Also the label has been
modified from service to io.kompose.service.
if a user specifies a docker-compose service
with restart value as "no" or "on-failure"
then normal pod will be created as against
to a controller and a pod.
