WIP update to support batch processing

src/Microsoft.SqlTools.ServiceLayer/QueryExecution/Contracts/QueryExecuteCompleteNotification.cs

@@ -22,15 +22,10 @@ namespace Microsoft.SqlTools.ServiceLayer.QueryExecution.Contracts
         /// </summary>
         public string[] Messages { get; set; }
 
-        /// <summary>
-        /// Whether or not the query was successful. True indicates errors, false indicates success
-        /// </summary>
-        public bool HasError { get; set; }
-
         /// <summary>
         /// Summaries of the result sets that were returned with the query
         /// </summary>
-        public ResultSetSummary[] ResultSetSummaries { get; set; }
+        public BatchSummary[] BatchSummaries { get; set; }
     }
 
     public class QueryExecuteCompleteEvent