Merge branch 'rs-issue-119' into 'master'

Don't render Linked LDAP groups forms when LDAP is disabled

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/119

See merge request !283

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

@@ -24,7 +24,7 @@
       = f.submit 'Save changes', class: "btn btn-save"
       = link_to  'Cancel', admin_group_path(@group), class: "btn btn-cancel"
 
-- if @group.persisted?
+- if ldap_enabled? && @group.persisted?
   %h3.page-title Linked LDAP groups
   = render 'ldap_group_links/form', group: @group
   = render 'ldap_group_links/ldap_group_links', group: @group