test data additions / holds

test data additions / holds

For the first 20 users in each patron group and the first 3 users in
each staff group:

 * create 3 regular and 3 overdue circs
 * create 3 title holds, one of which is frozen
 * if the user is in a Staff group, also create one copy hold.

Signed-off-by: Bill Erickson <berick@esilibrary.com>