Fix template conversion (#8976)

DO NOT DELETE THIS TEXT

#### Please note

> Please read this information carefully. You can run `./scripts/pre-commit.php` to check your code before submitting.

- [x] Have you followed our [code guidelines?](http://docs.librenms.org/Developing/Code-Guidelines/)

#### Testers

If you would like to test this pull request then please run: `./scripts/github-apply <pr_id>`, i.e `./scripts/github-apply 5926`

includes/alerts.inc.php

@@ -391,7 +391,7 @@ function populate($txt, $wrap = true)
 function RunJail($code, $obj)
 {
     $ret = '';
-    eval($code);
+    @eval($code);
     return $ret;
 }//end RunJail()
 
@@ -808,7 +808,7 @@ function ExtTransports($obj)
     global $config;
     $tmp = false;
     $type  = new Template;
-    
+
     // If alert transport mapping exists, override the default transports
     $transport_maps = AlertUtil::getAlertTransports($obj['alert_id']);