[ApacheDS Schema] renaming ou=schema partiton

[Kiran Ayyagari]

hello guys,

      While talking to Emmanuel on IRC, we thought about replacing the content 
of the ou=schema partition with
      what cn=schema holds(all schema objects) and renaming the partition to 
cn=schema.

      This change IMO will make things more clear, e.x having the partition 
name same as the SSSE name.

      wdyt?

Kiran Ayyagari