Fixes
https://fedorahosted.org/sssd/ticket/1031
This patch creates a set of schema defaults that corresponds to Active
Directory 2008r2. It can be set up simply by specifying
ldap_schema = AD
Operationally, it behaves like any other RFC2307bis server at this time.
This patch does not remove the requirement for SFU/SUA support in Active
Directory. More enhancements will follow to add support for AD-specific
features.