Fix group test

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/groups/_new_group_member.html.haml

-= form_for @users_group, url: group_users_groups_path(@group), html: { class: 'form-horizontal' } do |f|
+= form_for @users_group, url: group_users_groups_path(@group), html: { class: 'form-horizontal users-group-form' } do |f|
   %h4.append-bottom-20
     New member(s) for
     %strong #{@group.name}

features/steps/group/group.rb

@@ -40,7 +40,7 @@ class Groups < Spinach::FeatureSteps
 
   And 'I select user "John" from list with role "Reporter"' do
     user = User.find_by_name("John")
-    within ".new_users_group" do
+    within ".users-group-form" do
       select2(user.id, from: "#user_ids", multiple: true)
       select "Reporter", from: "group_access"
     end