Add WinRM file transfer error and english text

plugins/communicators/winrm/errors.rb

@@ -21,6 +21,10 @@ module VagrantPlugins
       class WinRMNotReady < WinRMError
         error_key(:winrm_not_ready)
       end
+
+      class WinRMFileTransferError < WinRMError
+        error_key(:winrm_file_transfer_error)
+      end
     end
   end
 end

templates/locales/comm_winrm.yml

@@ -20,3 +20,9 @@ en:
         The box is not able to report an address for WinRM to connect to yet.
         WinRM cannot access this Vagrant environment. Please wait for the
         Vagrant environment to be running and try again.
+      winrm_file_transfer_error: |-
+        Failed to transfer a file between the host and guest
+
+        From: %{from}
+        To: %{to}
+        Message: %{message}