Ensures HealthCheckController is authorized to user with developer access

(cherry picked from commit 7c4eb71f07)

src/Umbraco.Web/HealthCheck/HealthCheckController.cs

@@ -3,12 +3,14 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Web.Http;
 using Umbraco.Web.Editors;
+using Umbraco.Web.WebApi.Filters;
 
 namespace Umbraco.Web.HealthCheck
 {
     /// <summary>
     /// The API controller used to display the health check info and execute any actions
     /// </summary>
+    [UmbracoApplicationAuthorize(Core.Constants.Applications.Developer)]
     public class HealthCheckController : UmbracoAuthorizedJsonController
     {
         private readonly IHealthCheckResolver _healthCheckResolver;