Bug 719069 - clean up compiler warnings in 389-ds-base 1.2.9
    
    https://bugzilla.redhat.com/show_bug.cgi?id=719069
    
    Description:
    slapd/entry.c
      -- added const qualifier to the 2nd arg of _entry_set_tombstone_rdn.
    slapd/mapping_tree.c
      -- commented out mapping_tree_node_validate.
    plugins/automember/automember.c
      -- removed a unused variable smods.
      -- modified to use label "bail".
      -- replaced deprecated slapi_entry_attr_hasvalue with
         slapi_entry_attr_has_syntax_value.
    plugins/mep/mep.c
      -- replaced deprecated slapi_entry_attr_hasvalue with
         slapi_entry_attr_has_syntax_value.