Move DN handling methods to LDAPConnection

ldap2 has "DN normalization" functionality, which silently adds the base
DN to DNs that don't already end with it.
This functionality is left in the ldap2 class only.

Part of the work for: https://fedorahosted.org/freeipa/ticket/2660

ipaserver/plugins/ldap2.py

@@ -204,8 +204,8 @@ class ldap2(LDAPConnection, CrudBackend):
         Normalize distinguished name by assuring it ends with
         the base_dn.
 
-        Note: You don't have to normalize DN's before passing them to
-              ldap2 methods. It's done internally for you.
+        Note: ldap2 methods normalize DNs internally, but relying on this is
+            not recommended.
         """
 
         assert isinstance(dn, DN)
@@ -218,40 +218,6 @@ class ldap2(LDAPConnection, CrudBackend):
 
         return dn
 
-    def make_dn_from_attr(self, attr, value, parent_dn=None):
-        """
-        Make distinguished name from attribute.
-
-        Keyword arguments:
-        parent_dn -- DN of the parent entry (default '')
-        """
-        if parent_dn is None:
-            parent_dn = DN()
-        assert isinstance(parent_dn, DN)
-        parent_dn = self.normalize_dn(parent_dn)
-
-        if isinstance(value, (list, tuple)):
-            value = value[0]
-
-        return DN((attr, value), parent_dn)
-
-    def make_dn(self, entry_attrs, primary_key='cn', parent_dn=None):
-        """
-        Make distinguished name from entry attributes.
-
-        Keyword arguments:
-        primary_key -- attribute from which to make RDN (default 'cn')
-        parent_dn -- DN of the parent entry (default '')
-        """
-
-        assert primary_key in entry_attrs
-
-        if parent_dn is None:
-            parent_dn = DN()
-
-        parent_dn = self.normalize_dn(parent_dn)
-        return DN((primary_key, entry_attrs[primary_key]), parent_dn)
-
     def add_entry(self, dn, entry_attrs, normalize=True):
         """Create a new entry."""