Fix vagrant so that ssh commands work OOTB, (squashed) move verify to vagrant/util.sh, remove run_provider_test, cleanup.

cluster/vagrant/provision-master.sh

@@ -54,6 +54,7 @@ for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
     echo "Adding $minion to hosts file"
     echo "$ip $minion" >> /etc/hosts
   fi
+  echo "127.0.0.1 localhost" >> /etc/hosts # enables cmds like 'kubectl get pods' on master.
 done
 
 # Update salt configuration

cluster/vagrant/util.sh

@@ -174,6 +174,12 @@ function verify-cluster {
     done
   done
 
+  # By this time, all kube api calls should work, so no need to loop and retry.
+  echo "Validating we can run kubectl commands."
+  vagrant ssh master --command "kubectl get pods" || {
+    echo "WARNING: kubectl to localhost failed.  This could mean localhost is not bound to an IP"
+  }
+  
   (
     echo
     echo "Kubernetes cluster is running.  The master is running at:"