Fixing usings on the merge

Author: brnleehng

src/ResourceManager/AzureBatch/Commands.Batch/Jobs/NewBatchJobCommand.cs

@@ -14,7 +14,6 @@
 
 using System.Collections;
 using Microsoft.Azure.Commands.Batch.Models;
-using System.Collections;
 using System.Management.Automation;
 using Constants = Microsoft.Azure.Commands.Batch.Utils.Constants;
 

src/ResourceManager/AzureBatch/Commands.Batch/Models/BatchClient.Accounts.cs

@@ -20,6 +20,7 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
+using System.Net.Http;
 using System.Threading.Tasks;
 using Microsoft.Azure.Batch;
 using Microsoft.Rest.Azure;