Pass OmniAuth formatted options to OmniAuth::LDAP::Adaptor

changelogs/unreleased/dm-ldap-authentication-ssl-verification.yml

+---
+title: Fix LDAP authentication to Git repository or container registry
+merge_request:
+author:

lib/gitlab/ldap/authentication.rb

@@ -42,7 +42,7 @@ module Gitlab
       end
 
       def adapter
-        OmniAuth::LDAP::Adaptor.new(config.options.symbolize_keys)
+        OmniAuth::LDAP::Adaptor.new(config.omniauth_options)
       end
 
       def config