simplify $management READ request

lib/client.js

@@ -55,7 +55,7 @@ EventHubClient.prototype.getPartitionIds = function () {
     var replyTo = uuid.v4();
 
     var request = {
-      body: 'stub',
+      body: [],
       properties: {
         messageId: uuid.v4(),
         replyTo: replyTo
@@ -67,13 +67,7 @@ EventHubClient.prototype.getPartitionIds = function () {
       }
     };
 
-    var rxopt = {
-      attach: {
-        target: {
-          address: replyTo
-        }
-      }
-    };
+    var rxopt = { attach: { target: { address: replyTo } } };
 
     this.open()
       .then(function () {