Auto Collection Bugfixes (#1769)

* SeriesGroup tag can now have comma separated value to allow a series to be a part of multiple collections.

* Added a missing unit test

* Refactored how collection tags are created to work in the scan loop reliably.

* Added a unit test for RemoveTagsWithoutSeries

* Fixed a bug in reading list title generation to avoid Volume 0 if the underlying file had a title set. Fixed a misconfigured unit test.

API.Tests/Helpers/EntityFactory.cs

@@ -61,14 +61,6 @@ public static class EntityFactory
         };
     }
 
-    public static SeriesMetadata CreateSeriesMetadata(ICollection<CollectionTag> collectionTags)
-    {
-        return new SeriesMetadata()
-        {
-            CollectionTags = collectionTags
-        };
-    }
-
     public static CollectionTag CreateCollectionTag(int id, string title, string summary, bool promoted)
     {
         return DbFactory.CollectionTag(id, title, summary, promoted);