The value of the object tmnxLocUsrDbDhcpUnDuplicateHost indicates
the name of the host that is already matched and that has the same
values, configured for the objects that correspond with the match
types, as this unmatched host.
This value of this object is the empty string, unless the value of
tmnxLocUsrDbDhcpUnmatchedReason is 'duplicate (2)'.