Ticket 47437 - Some attributes in cn=config should not be multivalued
Description: Many configuration attributes are not defined in the schema,
this allows for duplicate attributes, when only one should be allowed.
As well as invalid values being added to certain attributes.
Adding all the attributes to the schema allows for syntax checking, and
enforcing single/multiple valued attributes.
https://fedorahosted.org/389/ticket/47437
Successfully tested with freeipa-3.3.3.4 on f20
Reviewed by: rmeggins & tbordaz(Thanks!!)