Local kubeconfig tests: Allow no master nodes when external controlplane topology
Local kubeconfig tests: Allow no master nodes when external controlplane topology

External controlplane topology implies there are no master nodes, so
allow that.

sallyom/origin,csrwng/origin,mahak/origin,hroyrh/origin,akram/origin,openshift/origin,gabemontero/origin,mfojtik/origin,soltysh/origin,mahak/origin,bparees/origin,JacobTanenbaum/origin,csrwng/origin,bparees/origin,hroyrh/origin,jsafrane/origin,jsafrane/origin,soltysh/origin,openshift/origin,openshift/origin,akram/origin,soltysh/origin,bparees/origin,gabemontero/origin,deads2k/origin,JacobTanenbaum/origin,csrwng/origin,sallyom/origin,JacobTanenbaum/origin,sallyom/origin,deads2k/origin,jsafrane/origin,mfojtik/origin,gabemontero/origin,hroyrh/origin,mfojtik/origin,akram/origin,deads2k/origin,mahak/origin