move capybara scenarios to spec/features

spec/features/admin/admin_hooks_spec.rb

spec/features/admin/admin_projects_spec.rb

spec/features/admin/admin_users_spec.rb

spec/features/admin/security_spec.rb

spec/features/atom/dashboard_issues_spec.rb

spec/features/atom/dashboard_spec.rb

spec/features/atom/issues_spec.rb

spec/features/gitlab_flavored_markdown_spec.rb

spec/features/issues_spec.rb

spec/features/notes_on_merge_requests_spec.rb

spec/features/notes_on_wall_spec.rb

spec/features/profile_spec.rb

spec/features/projects_deploy_keys_spec.rb

spec/features/projects_spec.rb

spec/features/search_spec.rb

spec/features/security/profile_access_spec.rb

spec/features/security/project_access_spec.rb

spec/features/snippets_spec.rb