debuginfod: Minor run-debuginfod-find.sh test fixes

$PORT3's metrics are not reported on error and $PID4 was not properly
killed. This patch addresses both of those issues by reporting the
metrics of $PORT3 as $PORT1 and $PORT2 were in err() and waiting for
$PID4 to terminate before continuing with the test.

Signed-off-by: Noah Sanci <nsanci@redhat.com>
2 files changed