mw/kubernetes: revert if-else for health (#970)
mw/kubernetes: revert if-else for health (#970)

Do the return early and dedent the rest of the function.
miekg/coredns,johnbelamaric/coredns,ii/coredns,miekg/coredns,coredns/coredns,johnbelamaric/coredns,chrisohaver/coredns,jremond/coredns,ii/coredns,jremond/coredns,yongtang/coredns