samba - Jan 2012 - Cheng DN - upgrade from samba 4.0.0.11 to samba 4.0.0.17

Hi
How To change this DN (in samba4):
*CN=SCIENCE*, OU=Domain Controllers,DC=science,DC=samba,DC=example,DC=com
To:
*CN=SCIENCE-AD*, OU=Domain Controllers,DC=science,DC=samba,DC=example,DC=com
?

Note:
I need to change smab4  Hostname for upgrade from old samba 4.0.0.11 to
samba 4.0.0.13 to samba4.0.0.17, because hostname  same to domain name and
upgradeprovision not work!