Fix feedback from PR

Assets/ScriptableRenderLoop/HDRenderLoop/HDRenderLoop.cs

             protected override void InternalBuild()
             {
                 base.InternalBuild(); 
-                HDRenderLoop realOwner = GetRealOwner<HDRenderLoop>();
-                realOwner.Build();
+                HDRenderLoop theOwner = owner as HDRenderLoop;
+                if (theOwner != null)
+                    theOwner.Build();
-                base.InternalBuild();
-                HDRenderLoop realOwner = GetRealOwner<HDRenderLoop>();
-                realOwner.Cleanup();
+                base.InternalCleanup();
+                HDRenderLoop theOwner = owner as HDRenderLoop;
+                if (theOwner != null)
+                    theOwner.Cleanup();
             }
         }
 

Assets/ScriptableRenderLoop/core/RenderPipeline.cs

 		public override void Render(ScriptableRenderContext renderContext, IScriptableRenderDataStore dataStore)
 		{
 			if (dataStore == null)
-				throw new ArgumentException(string.Format("DataStore has been passed into pipe {0}", this));
+				throw new ArgumentException(string.Format("Null DataStore has been passed into pipe {0}", this));
-				throw new ArgumentException(string.Format("DataStore owner is not set to {0}", this));
+				throw new ArgumentException(string.Format("DataStore owner is null. It needs o be owned by loop {0}", this));
 
 			if (dataStore.owner != null && !ReferenceEquals(dataStore.owner, this))
 				throw new ArgumentException(string.Format("DataStore {0} has been passed into pipe {1}, but is owned by {2}", dataStore, this, dataStore.owner));
 		}
 
-		public override void Cleanup()
+		public override void ClearCachedData()
 		{
 			foreach (var store in m_AssociatedDataStores)
 				store.Cleanup();

Assets/ScriptableRenderLoop/core/RenderingDataStore.cs

 		{}
 
 		public IRenderPipeline owner { get; private set; }
-
-		public T GetRealOwner<T>() where T : IRenderPipeline
-		{
-			return (T)owner;
-		}
 	}
 }

Assets/ScriptableRenderLoop/fptl/FptlLighting.cs

             protected override void InternalBuild()
             {
                 base.InternalBuild();
-                FptlLighting realOwner = GetRealOwner<FptlLighting>();
-                realOwner.Build();
+                FptlLighting theOwner = owner as FptlLighting;
+                if (theOwner != null)
+                    theOwner.Build();
-                base.InternalBuild();
-                FptlLighting realOwner = GetRealOwner<FptlLighting>();
-                realOwner.Cleanup();
+                base.InternalCleanup();
+                FptlLighting theOwner = owner as FptlLighting;
+                if (owner != null)
+                    theOwner.Cleanup();
             }
         }