Fix occasional test failures in TestSceneBetmapRecommendations

The game was being constructed befor the API was setup, which could mean
depending on test execution ordering and speed, the recommendations
array would not be filled.

Easy to reproduce by `[Solo]`ing `TestCorrectStarRatingIsUsed`.

See https://github.com/ppy/osu/runs/28689915929#r0s0.

osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapRecommendations.cs

@@ -31,8 +31,6 @@ namespace osu.Game.Tests.Visual.SongSelect
         [SetUpSteps]
         public override void SetUpSteps()
         {
-            base.SetUpSteps();
-
             AddStep("populate ruleset statistics", () =>
             {
                 Dictionary<string, UserStatistics> rulesetStatistics = new Dictionary<string, UserStatistics>();
@@ -68,6 +66,8 @@ namespace osu.Game.Tests.Visual.SongSelect
                         return 0;
                 }
             }
+
+            base.SetUpSteps();
         }
 
         [Test]