Bug 36766: (QA follow-up) Pass more variable to the template

Libraries may want to use this for more varied purposes and
adjust the language of the email based on the sftp upload
that succeeded or failed.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>

misc/cronjobs/sftp_file.pl

@@ -195,9 +195,16 @@ if ( $sftp->put( $fh, basename($file) ) ) {
 if ($email) {
     $status_email = C4::Letters::GetPreparedLetter(
         module                 => 'commandline',
-        letter_code            => "SFTP_$sftp_status",             #SFTP_SUCCESS, SFTP_FAILURE
+        letter_code            => "SFTP_$sftp_status",    #SFTP_SUCCESS, SFTP_FAILURE
         message_transport_type => 'email',
-        substitute             => { sftp_error => $sftp->error }
+        substitute             => {
+            sftp_error => $sftp->error,
+            email      => $email,
+            file       => $file,
+            host       => $host,
+            upload_dir => $upload_dir,
+            user       => $user,
+        }
     );
 
     C4::Letters::EnqueueLetter(