1175637 - make the sql Oracle 10g compatible

addressing:
SQL> SQL>   2    3    4    5    6    7    8    9   10   11   12   13  SELECT mi.index_name, mi.table_name, mi.tablespace_name, LISTAGG ( mic.column_name, ', ' )
         *
ERROR at line 3:
ORA-06550: line 3, column 10:
PL/SQL: ORA-00923: FROM keyword not found where expected
ORA-06550: line 2, column 14:
PL/SQL: SQL Statement ignored
Automatic commit of package [spacewalk-utils] release [2.3.24-1].