Add more info to about the step that failed during an execution of a recipe.

--HG--
branch : dev

src/Orchard.Web/Modules/Orchard.Recipes/Services/RecipeStepExecutor.cs

@@ -39,14 +39,16 @@ namespace Orchard.Recipes.Services {
                 Logger.Error(exception, "Recipe execution {0} was cancelled because a step failed to execute", executionId);
                 while (_recipeStepQueue.Dequeue(executionId) != null) ;
                 _recipeJournal.ExecutionFailed(executionId);
-                return false;
+                throw new OrchardCoreException(T("Recipe execution with id {0} was cancelled because the \"{1}\" step failed to execute. The following exception was thrown: {2}. Refer to the recipe journal for more information.", 
+                    executionId, nextRecipeStep.Name, exception.Message));
             }
 
             if (!recipeContext.Executed) {
                 Logger.Error("Could not execute recipe step '{0}' because the recipe handler was not found.", recipeContext.RecipeStep.Name);
                 while (_recipeStepQueue.Dequeue(executionId) != null) ;
                 _recipeJournal.ExecutionFailed(executionId);
-                return false;
+                throw new OrchardCoreException(T("Recipe execution with id {0} was cancelled because the recipe handler for step \"{1}\" was not found. Refer to the recipe journal for more information.",
+                    executionId, nextRecipeStep.Name));
             }
 
             return true;

src/Orchard.Web/Modules/Orchard.Setup/Controllers/SetupController.cs

@@ -1,11 +1,9 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
 using System.Web.Mvc;
 using Orchard.Environment;
 using Orchard.Environment.Configuration;
 using Orchard.Logging;
-using Orchard.Recipes.Models;
 using Orchard.Setup.Services;
 using Orchard.Setup.ViewModels;
 using Orchard.Localization;