Add tests for admin service templates

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

-- pretty_name = defined?(@project) ? @project.path_with_namespace : "namespace / path"
+- pretty_name = defined?(@project) ? @project.name_with_namespace : "namespace / path"
 - run_actions_text = "Perform common operations on this project: #{pretty_name}"
 
 .well

spec/controllers/admin/services_controller_spec.rb

+require 'spec_helper'
+
+describe Admin::ServicesController do
+  let(:admin) { create(:admin) }
+
+  before { sign_in(admin) }
+
+  describe 'GET #edit' do
+    let!(:project) { create(:empty_project) }
+
+    Service.available_services_names.each do |service_name|
+      context "#{service_name}" do
+        let!(:service) do
+          service_template = service_name.concat("_service").camelize.constantize
+          service_template.where(template: true).first_or_create
+        end
+
+        it 'successfully displays the template' do
+          get :edit, id: service.id
+
+          expect(response).to have_http_status(200)
+        end
+      end
+    end
+  end
+end