Update fix-Repo-seqs.sql

Clean up vestigial code in comments. Add directive to assign hibernate_seq_next_value.
Update Node-Locale.sql

Use proper Oracle syntax for adding a column to a table.
Update modify-index-permission_id.sql

Comment "you can not use the deleted table in the where clause" is false for Oracle, and the syntax is incorrect. According to the Oracle® Database SQL Reference, "The condition can reference the object from which you are deleting..."
Update modify-index-permission_id.sql

Script referred to constraint that was not given a name when established. The expected name was too long for an Oracle identifier. The replacement is more robust.