added systemMetadata table to the upgrade scripts
Modified table structure to change identifiers table (previously unused) to represent a mapping between arbitrary string identifiers and metacat docids.More information in https://trac.dataone.org/ticket/361. Modifications toOracle schemas were made but not tested.
Add upgrade scripts for 1.9.2 (scheduler tables)
Add additional indexed to match postgres scripts
replace <script>.sql files with <script>-oracle.sql files since the base files are implicitly oracle scripts