Allow Discography to be grabbed automatically if all albums will be released within 24 hours

(cherry picked from commit 87795708b5caf63e63570cb62c6043a781ee89ae)

Closes #3181

src/NzbDrone.Core.Test/DecisionEngineTests/DiscographySpecificationFixture.cs

@@ -57,6 +57,14 @@ namespace NzbDrone.Core.Test.DecisionEngineTests
             Subject.IsSatisfiedBy(_remoteAlbum, null).Accepted.Should().BeTrue();
         }
 
+        [Test]
+        public void should_return_true_if_all_albums_will_have_released_in_the_next_24_hours()
+        {
+            _remoteAlbum.Albums.Last().ReleaseDate = DateTime.UtcNow.AddHours(23);
+
+            Subject.IsSatisfiedBy(_remoteAlbum, null).Accepted.Should().BeTrue();
+        }
+
         [Test]
         public void should_return_false_if_one_album_has_not_released()
         {

src/NzbDrone.Core/DecisionEngine/Specifications/DiscographySpecification.cs

@@ -25,7 +25,7 @@ namespace NzbDrone.Core.DecisionEngine.Specifications
             {
                 _logger.Debug("Checking if all albums in discography release have released. {0}", subject.Release.Title);
 
-                if (subject.Albums.Any(e => !e.ReleaseDate.HasValue || e.ReleaseDate.Value.After(DateTime.UtcNow)))
+                if (subject.Albums.Any(e => !e.ReleaseDate.HasValue || e.ReleaseDate.Value.After(DateTime.UtcNow.AddHours(24))))
                 {
                     _logger.Debug("Discography release {0} rejected. All albums haven't released yet.", subject.Release.Title);
                     return Decision.Reject("Discography release rejected. All albums haven't released yet.");

src/NzbDrone.Core/IndexerSearch/AlbumSearchService.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;