fix missing @ in the apache templates

[swenske]

No description provided.

[swenske]

It seems that this forgetfulness has passed through the CI tests. As it crash with puppet 5, I make you a PR urgently

Error: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Function Call, Failed to parse template puppetboard/apache/ldap.erb:
Filepath: /etc/puppetlabs/code/modules/puppetboard/templates/apache/ldap.erb
Line: 21
Detail: undefined local variable or method `ldap_require_group_dn' for #Puppet::Parser::TemplateWrapper:0x755f974b
(file: /etc/puppetlabs/code/modules/puppetboard/manifests/apache/vhost.pp, line: 134, column: 18) on node xxxxxxxxxxxxxxxxxxx
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run

[swenske]

I'm sorry for that, I'd be more careful the next time

[bastelfreak]

Thanks @swenske !