Merge pull request #1478 from delfer/patch-2

[terraform/openstack] fixed mistake in README.md

contrib/terraform/openstack/README.md

@@ -225,11 +225,6 @@ ssh [os-user]@[master-ip] sudo cat /etc/kubernetes/ssl/ca.pem > ca.pem
 kubectl config set-cluster default-cluster --server=https://[master-internal-ip]:6443 \
     --certificate-authority=ca.pem 
 
-kubectl config set-credentials default-admin \
-    --certificate-authority=ca.pem \
-    --client-key=admin-key.pem \
-    --client-certificate=admin.pem      
-
 kubectl config set-credentials default-admin \
     --certificate-authority=ca.pem \
     --client-key=admin-key.pem \