Add Changelog entry

CHANGELOG

@@ -12,6 +12,7 @@ v 8.8.0 (unreleased)
   - Reduce delay in destroying a project from 1-minute to immediately
   - Make build status canceled if any of the jobs was canceled and none failed
   - Upgrade Sidekiq to 4.1.2
+  - Added /health_check endpoint for checking service status
   - Sanitize repo paths in new project error message
   - Bump mail_room to 0.7.0 to fix stuck IDLE connections
   - Remove future dates from contribution calendar graph.

app/controllers/admin/health_check_controller.rb

 class Admin::HealthCheckController < Admin::ApplicationController
   def show
-    begin
-      @errors = HealthCheck::Utils.process_checks('standard')
-    rescue => e
-      @errors = e.message.blank? ? e.class.to_s : e.message.to_s
-    end
+    @errors = HealthCheck::Utils.process_checks('standard')
   end
 end

app/views/admin/health_check/show.html.haml

@@ -16,21 +16,21 @@
   Health information can be reteived as plain text, json, or xml using:
   %ul
     %li
-      %code= health_check_url(token:current_application_settings.health_check_access_token)
+      %code= health_check_url(token: current_application_settings.health_check_access_token)
     %li
-      %code= health_check_url(token:current_application_settings.health_check_access_token, format: :json)
+      %code= health_check_url(token: current_application_settings.health_check_access_token, format: :json)
     %li
-      %code= health_check_url(token:current_application_settings.health_check_access_token, format: :xml)
+      %code= health_check_url(token: current_application_settings.health_check_access_token, format: :xml)
 
 %p.light
   You can also ask for the status of specific services:
   %ul
     %li
-      %code= health_check_url(token:current_application_settings.health_check_access_token, checks: :cache)
+      %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :cache)
     %li
-      %code= health_check_url(token:current_application_settings.health_check_access_token, checks: :database)
+      %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :database)
     %li
-      %code= health_check_url(token:current_application_settings.health_check_access_token, checks: :migrations)
+      %code= health_check_url(token: current_application_settings.health_check_access_token, checks: :migrations)
 
 %hr
 .panel.panel-default