[instrument_manager] Fix page load (#8183)

The function signature for Database->connect was updated in #8083,
but a call in the instrument_manager was missed.

This updates the call to pass the credentials with the new signature
which doesn't include username/password in the stack trace.

Resolves #8182

modules/instrument_manager/php/instrument_manager.class.inc

@@ -594,13 +594,17 @@ class Instrument_Manager extends \NDB_Menu_Filter
         // If the credentials are invalid, an error message will be logged to
         // the backend.
         try {
+            $dbname = $db_config['database'];
+            putenv("LORIS_{$dbname}_USERNAME=" . $db_config['adminUser']);
+            putenv("LORIS_{$dbname}_PASSWORD=" . $db_config['adminPassword']);
+            putenv("LORIS_{$dbname}_HOST=" . $db_config['host']);
             $connected = $db->connect(
-                $db_config['database'],
-                $db_config['adminUser'],
-                $db_config['adminPassword'],
-                $db_config['host'],
+                $dbname,
                 false
             );
+            putenv("LORIS_{$dbname}_USERNAME=");
+            putenv("LORIS_{$dbname}_PASSWORD=");
+            putenv("LORIS_{$dbname}_HOST=");
         } catch (\DatabaseException $e) {
             $connected = false;
         }