Adding new messaging for upload failures

this indicates that the operation can potentially be retried.

Author: begoldsm

src/ResourceManager/DataLakeStore/Commands.DataLakeStore/Models/DataLakeStoreFileSystemClient.cs

@@ -406,6 +406,10 @@ public void CopyFile(string destinationPath, string accountName, string sourcePa
 
                 TrackUploadProgress(uploadTask, progress, cmdletRunningRequest, cmdletCancellationToken);
             }
+            catch (Exception e)
+            {
+                throw new CloudException(string.Format(Properties.Resources.UploadFailedMessage, e));
+            }
             finally
             {
                 ServicePointManager.Expect100Continue = previousExpect100;

src/ResourceManager/DataLakeStore/Commands.DataLakeStore/Properties/Resources.Designer.cs

@@ -219,4 +219,7 @@
   <data name="TaskCancelledMessage" xml:space="preserve">
     <value>The operation is being cancelled, please wait...</value>
   </data>
+  <data name="UploadFailedMessage" xml:space="preserve">
+    <value>"Upload operation failed due to the following underlying error: {0}. You can try to resume the upload by specifying the "Resume" option. If the error persists, please contact Microsoft support."</value>
+  </data>
 </root>