Implement Admin config pages

In D7, we have the following admin pages which we will need to implement in D10:

Configs

• Ldap Validator: https://accounts.eclipse.org/admin/config/eclipse/site_login_settings/ldap_validator

Reports

• Duplicates: https://accounts.eclipse.org/admin/config/eclipse/site_login_settings/reports/duplicate
• Invalid Authmap: https://accounts.eclipse.org/admin/config/eclipse/site_login_settings/reports/dead_authmap
• Missing authmap: https://accounts.eclipse.org/admin/config/eclipse/site_login_settings/reports/missing_authmap
• Overview: https://accounts.eclipse.org/admin/config/eclipse/site_login_settings/reports

This is not critical to go live with the D10 implementation of the website.