Log invalid config file exceptions

(cherry picked from commit a95317446c452926819ad24f892a00770b1b23fc)

src/NzbDrone.Host/Bootstrap.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Data.SQLite;
-using System.Diagnostics;
 using System.IO;
 using System.Reflection;
 using System.Security.Cryptography;
@@ -231,6 +230,8 @@ namespace NzbDrone.Host
             }
             catch (InvalidDataException ex)
             {
+                Logger.Error(ex, ex.Message);
+
                 throw new InvalidConfigFileException($"{configPath} is corrupt or invalid. Please delete the config file and Radarr will recreate it.", ex);
             }
         }