Fix logic errors in validate cluster and make it work for vagrant again

cluster/vagrant/config-default.sh

@@ -27,4 +27,5 @@ export KUBERNETES_MASTER="https://10.245.1.2"
 MINION_IP_BASE="10.245.2."
 for (( i=0; i <${NUM_MINIONS}; i++)) do
 	KUBE_MINION_IP_ADDRESSES[$i]="${MINION_IP_BASE}$[$i+2]"
+	MINION_NAMES[$i]="${MINION_IP_BASE}$[$i+2]"
 done

cluster/vagrant/util.sh

@@ -67,3 +67,11 @@ function test-setup {
 function test-teardown {
 	echo "Vagrant ignores tear-down"
 }
+
+# Set the {user} and {password} environment values required to interact with provider
+function get-password {
+	export user=vagrant
+	export passwd=vagrant
+	echo "Using credentials: $user:$passwd"
+}
+