Fixed: Improve RarBG Error Handling

Closes #1883
Closes #1884

(cherry picked from commit 7cd38bba841659a595fe4a0e14c478fc4e4047b1)

src/NzbDrone.Core/Indexers/Rarbg/RarbgParser.cs

@@ -30,9 +30,12 @@ namespace NzbDrone.Core.Indexers.Rarbg
 
             if (jsonResponse.Resource.error_code.HasValue)
             {
-                if (jsonResponse.Resource.error_code == 20 || jsonResponse.Resource.error_code == 8)
+                if (jsonResponse.Resource.error_code == 5 || jsonResponse.Resource.error_code == 8
+                    || jsonResponse.Resource.error_code == 9 || jsonResponse.Resource.error_code == 10
+                    || jsonResponse.Resource.error_code == 13 || jsonResponse.Resource.error_code == 14
+                    || jsonResponse.Resource.error_code == 20)
                 {
-                    // No results found
+                    // No results, rate limit, tvdbid not found/invalid, or imdbid not found/invalid
                     return results;
                 }