(Clone Detection) Added tool to dump input groups

Use 92-dump-igroups to copy input groups out of a database into
an SQL file, then run the SQL to insert the igroups into some
other database.
(Clone Detection) Do not re-initialize memory that was already used
(Clone Detection) Minor adjustments to failure rate calculation

* The number of passing tests is a parameter in the debug_settings table.

* Changed the order of columns in the debug_posneg table.