TT#45476 Allow empty attachment_name in email_templates

Change-Id: Iafc9560e8542f58e620d35ff46c1afb670f94108

lib/NGCP/Panel/Controller/EmailTemplate.pm

@@ -183,6 +183,8 @@ sub tmpl_edit :Chained('tmpl_base') :PathPart('edit') {
                 # don't allow to change reseller id
             }
             delete $form->values->{reseller};
+            $form->values->{attachment_name} //= '';
+
             $c->model('DB')->txn_do(sub {
                 $c->stash->{tmpl}->update($form->values);
 
@@ -272,6 +274,7 @@ sub prepare_email_template_edit :Private {
     );
     return $posted, $form, $params;
 }
+
 sub create_email_template :Private {
     my ($self, $c, $form) = @_;
     if($form->validated) {
@@ -283,6 +286,8 @@ sub create_email_template :Private {
             }
             delete $form->values->{reseller};
 
+            $form->values->{attachment_name} //= '';
+
             my $schema = $c->model('DB');
             $schema->txn_do(sub {
                 my $tmpl = $c->stash->{tmpl_rs}->create($form->values);