Description of problem:
As part of bug 1235135 the cookie clean up code was disabled. It should be re-enabled and the transaction isolation should be lowered.


Version-Release number of selected component (if applicable):
5.0

How reproducible:
Always

Steps to Reproduce:
1. Login
2. wait 7 days (or hack the database)
3. Login again

Actual results:
The original cookie is still in the database

Expected results:
The original cookie is deleted

Additional info:
update logincookies set lastused = lastused - interval '8 days';