An entry containing Distributed Director per-service
per-metric weight information.
Entries in this table may be queried, created or
deleted by NMS. Each entry in this table is dependent
on entries in cddServerTable and cddServerPortTable.
If the associated entry in cddServerTable that has the
same cddServerAddrType and cddServerAddr values or the
associated entry in cddServerPortTable that has the
same cddServerPortNum value is deleted, the entry in
this table is deleted as well.