Fixed most of the broken tests

NzbDrone.Core/RootFolders/RootFolder.cs

@@ -0,0 +1,20 @@
+using System.Collections.Generic;
+using NzbDrone.Core.Datastore;
+using PetaPoco;
+
+namespace NzbDrone.Core.RootFolders
+{
+
+    [TableName("RootDirs")]
+    [PrimaryKey("Id", autoIncrement = true)]
+    public class RootFolder : BaseRepositoryModel
+    {
+        public string Path { get; set; }
+
+        [ResultColumn]
+        public ulong FreeSpace { get; set; }
+
+        [Ignore]
+        public List<string> UnmappedFolders { get; set; }
+    }
+}