pass vmSize to in converted casing to createVM()

lib/cli/commands/vm.js

@@ -95,7 +95,7 @@ exports.init = function(cli) {
         password: password,
         userName: userName,
         subscription: options.subscription,
-        size: options.vmSize,
+        size: vmSize,
         location: options.location,
         affinityGroup: options.affinityGroup,
         imageTarget: options.blobUrl,