Pass @service using subject

app/views/admin/services/_form.html.haml

@@ -4,7 +4,7 @@
 %p #{@service.description} template
 = form_for :service, url: admin_application_settings_service_path, method: :put, html: { class: 'form-horizontal fieldset-form' } do |form|
-  = render 'shared/service_settings', form: form
+  = render 'shared/service_settings', form: form, subject: @service
   .footer-block.row-content-block
     .form-actions

app/views/projects/services/_form.html.haml

@@ -7,7 +7,7 @@
     %p= @service.description
   .col-lg-9
     = form_for(@service, as: :service, url: namespace_project_service_path(@project.namespace, @project, @service.to_param), method: :put, html: { class: 'form-horizontal' }) do |form|
-      = render 'shared/service_settings', form: form
+      = render 'shared/service_settings', form: form, subject: @service
       .footer-block.row-content-block
         = form.submit 'Save changes', class: 'btn btn-save'

app/views/projects/services/mattermost_command/_help.html.haml

@@ -51,7 +51,7 @@
     .form-group
       = label_tag :request_url, 'Request URL', class: 'col-sm-2 col-xs-12 control-label'
       .col-sm-10.col-xs-12.input-group
-        = text_field_tag :request_url, service_trigger_url(@service), class: 'form-control input-sm', readonly: 'readonly'
+        = text_field_tag :request_url, service_trigger_url(subject), class: 'form-control input-sm', readonly: 'readonly'
         .input-group-btn
           = clipboard_button(clipboard_target: '#request_url')

app/views/shared/_service_settings.html.haml

 = form_errors(@service)
 - if lookup_context.template_exists?('help', "projects/services/#{@service.to_param}", true)
-  = render "projects/services/#{@service.to_param}/help", subject: @service
+  = render "projects/services/#{@service.to_param}/help", subject: subject
 - elsif @service.help.present?
   .well
     = preserve do