Adding missing license

Author: pragrawa

src/ResourceManager/RecoveryServices.Backup/Commands.RecoveryServices.Backup.HydraAdapter/BMSAPIs/RestoreDiskAPIs.cs

@@ -1,4 +1,18 @@
-using Microsoft.Azure.Commands.RecoveryServices.Backup.Cmdlets.Models;
+// ----------------------------------------------------------------------------------
+//
+// Copyright Microsoft Corporation
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ----------------------------------------------------------------------------------
+
+using Microsoft.Azure.Commands.RecoveryServices.Backup.Cmdlets.Models;
 using Microsoft.Azure.Management.RecoveryServices.Backup.Models;
 using System;
 using System.Collections.Generic;