Hide user membership in groups at user page

Based on projects visitor can see when browse user page
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/users_controller.rb

@@ -11,6 +11,7 @@ class UsersController < ApplicationController
     end
     @events = @user.recent_events.where(project_id: @projects.map(&:id)).limit(20)
     @title = @user.name
+    @groups = @projects.map(&:group).compact.uniq
   end
 
   def determine_layout

app/views/users/show.html.haml

@@ -14,7 +14,7 @@
       %small member since #{@user.created_at.stamp("Nov 12, 2031")}
     .clearfix
     %h4 Groups:
-    = render 'groups', groups: @user.groups 
+    = render 'groups', groups: @groups
     %hr
     %h4 User Activity:
     = render @events